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5th grade math application questions with answers

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1:Sporting Goods has 90 ping pong balls, if every two of them in a box, can they be filled exactly? If you fill a box with every five, will you be able to fill them all? Why?

90#2=45 boxes

90#5=18 boxes

Answer:If you pack one box for every two, will you be able to fill them up exactly if you pack one box for every five. Because 90 is divisible by five.

2: There are 57 balls in the sports store, will they fit in exactly one box for every three?

57#3+19 boxes

Answer: It will fit exactly.

3: A, B two people typing typing a 10,000-word document, A typing 115 words per minute, B typing 135 words per minute, a few minutes can finish?

10000#(115+135)=40 minutes

Answer: 40 minutes.

4:Fifth-grade students planted trees, 13 or 14 people in a group are exactly divided, the fifth grade students to participate in tree planting at least how many?

13X14=192

Answer: There are at least 192 people in the fifth grade who participated in the planting.

The following questions are application questions, but they are related to equations. I used equations for all of them.

5:Two cars are traveling back to back from one place. One car travels 31 kilometers per hour and the other travels 44 kilometers per hour. After how many minutes are the cars 300 km apart?

Equation:

Solution: The two cars meet after X hours.

31X+44X=300

75X=300

X=4

4 hours=240 minutes

Answer:The two cars are 300 km apart after 240 minutes.

6:Two teams of engineers want to **** together to dig through a tunnel 119 meters long, the two teams from both ends of the construction separately. Team A digging 4 meters a day, team B digging 3 meters a day, after how many days can the tunnel through?

Solution: Dig the tunnel in X days

3X+4X=119

7X=119

X=17

Answer: Dig the tunnel in 17 days.

7:There are 140 people in the school choir and dance team***.The number of people in the choir is six times that of the dance team.How many people are in the dance team?

Solution:Let there be X people in the dance team

6X+X=140

7X=140

X=20 people

Answer:There are 20 people in the dance team.

It's not an equation from here on.

8:Two brothers are walking from their house to the gym at the same time, and the road is 1300 meters long. The older brother walks 80 meters per minute, the younger brother rides a bicycle at 180 meters per minute to the stadium and returns immediately, meeting the older brother on the way, how many minutes did the older brother walk?

1300X2=2600 meters 2600#(180+80)

=2600#260

=10 minutes

Answer:The brother walked for 10 minutes.

9:: June 1 Children's Day, Mr. Wang bought 360 cookies, 480 pieces of sugar, 400 fruits, to make a beautiful small gift packages, distributed to the children as gifts, up to how many small gift packages can be made?

360+480+400=1240

Answer: Up to 1240 gift packs.

10:Naughty bought 40 balloons and invited his classmates to blow up the balloons. In order to divide the balloons equally, how many students should Naughty ask to blow up the balloons? The students will not participate in the competition.

40#2=20 40#4=10 40#5=8

40#8=5 40#@0=4 40#20=2

Answer: There are 6 ways to invite students: 20, 10, 5, 8, 4, 2.

11: A trapezoidal cornfield with an upper base of 15 meters, a lower base of 24 meters and a height of 18 meters. On average, 9 corn plants are planted per square meter. How many corn plants can be planted in this field in one ****?

(15+24)X18#2=351 square meters

351X9=3195 plants

Answer: This plot can grow 3159 plants of corn.

12:The number of students in a class is less than 100, and when they are lined up, there is just one more student in each row of 5, 4 and 3, how many students are there in this class?

5X4X3=60 60+1=61

Answer: There are 61 people in this class.

13:Wang Yue has a box of chocolate candies, each time the number of 7, 5, 3 pieces of the number are left 1, the box of chocolate candies at least how many pieces?

7X5X3=105 105+1=106

Answer: There are at least 106 chocolate candies in this box.

14: In the Morning Glory neighborhood, there is a 15-meter-long, 1.2-meter-wide section of a rectangular canal to be paved with square tiles. The designer has prepared a side length of 30 centimeters of square tiles, please calculate: how many of these square tiles are needed? If each square brick 3 yuan, then paving this canal need how many yuan?

15 meters=150 decimeters 1.2 meters=12 decimeters 30 centimeters=3 decimeters

150X12=1800 square decimeters 3X3=9 square decimeters

1800#9=200 200 pieces 200X3=600 yuan

Answer: 200 such tiles are needed, and it will cost 600 yuan.

15:There are two parallelograms of equal area in the experimental field, one with a bottom edge of 70 meters long and a height of 45 meters, and the other with a bottom edge of 90 meters long and a height of how many meters?

70X45=3150 square meters 3150#90=35 meters

Answer:The height is 35 meters.

16:A batch of steel pipes are stacked in a pile, the bottom layer has 10 pipes, and each upper layer has 1 pipe less, so the top layer has 5 pipes. How many tubes are in this batch?

10-5+1=6 layers (10+5)X6#2

=15X6#2

=90#2

=45

Answer:There are 45 pipes in the batch.

Wait ---- and ----

1.The village of Donggao wants to build a rectangular cistern which is planned to hold 720 tons of water. The length of the pool is known to be 18 meters, the width is known to be 8 meters, and the depth is known to be at least how many meters? (1 cubic meter of water weighs 1 ton.) (Answer with an equation)

2. A rectangular swimming pool, 50 meters long and 25 meters wide, has an original depth of water of 1.2 meters. If a pump is used to drain the water outward at a rate of 2.5 cubic meters per minute, how many hours will it take to drain it?

3. A rectangular gasoline barrel, the bottom area is 16 square decimeters, the height is 6 decimeters, if 1 liter of gasoline in 0.74 kg, this has the same can be filled with how many kilograms of gasoline?

4. 2100 squares with an angle of 1 centimeter are stacked into a rectangle, which is 1 decimeter high and has a length and width greater than the height. What are its length and width in centimeters?

First question:

Solution: the depth is at least X meters,

18*8X=720

144X=720

X=5

Answer: the depth is at least 5 meters.

Second question:

50*25*1.2=1500 (cubic meters)

1500/25=600 (minutes)

600 minutes = 10 hours

Answer: it takes 10 hours.

Third question:

16*6=96 cubic meters=96 liters

96*0.74=71.04 kg

Answer: this oil drum can hold 71.04 kg.

Question 4:

1 decimeter = 10 centimeters

2100/10 = 210 (centimeters)

210/70 = 3 (centimeters) or 210/30 = 70 (centimeters)

Answer: the length is 70 centimeters; the width is 3 centimeters; or the length is 30; the width is 7 centimeters.

Question 5:

There is a square with a side length of 2 centimeters, find the surface area of this square?

Answer:2*2*6=24 (square centimeters)

Question 6:

There is a rectangle with a length of 2 centimeters, a height of 2 centimeters, and a width of 1 centimeter, find the surface area?

Answer: (2*2+2*1+2*1)*2=16 (square centimeters)

Question 7: How many square meters is the surface area of a rectangular board that is 2 meters long, 5 meters wide, and 8 meters thick? What is the volume in cubic meters?

Answer: surface area: (2*5+2*8+5*8)*2=132 (square meters)

Volume: 2*5*8=80 (cubic meters)

Question 8: The prongs of a square oil drum have a length of 0.8 meters, how many liters is its volume? How many square decimeters of tin were used to make this oil drum?

0.8*0.8*0.8 = 0.512 (square meters) = 512 (liters)

0.8*0.8*6 = 3.084 (square meters) = 348 (square decimeters)

Course 9: There are three wooden rods that are 12 centimeters long, 44 centimeters long, and 56 centimeters long. To cut them all into sticks of the same length, with no leftovers allowed, what is the longest each stick can be?

Answer: here we are looking for the greatest common divisor of 12, 44, 56,! Do the math yourself!

Question 10: What is the minimum size of glass needed for an uncovered square fish tank with prongs 50 centimeters long?

Answer: 50*50*5=12500 (square centimeters)

Question 11: How many pieces of candy are there in a bag of candy that can be divided between 8 or 10 people?

Answer: Here we are looking for the least common multiple of 8 and 10.

Question 12: There is a carton of milk, divided into 5 people or divided into 7 people, there is a bottle of milk left, how many bottles of milk are there in the carton at least?

Answer: here the least common multiple of 5 and 7 is found in + on 1

Question 13: A rectangular piece of land is 40 meters long and 45 meters wide and has the same area as another piece of parallelogram with a base of 75 meters, what is the height of this piece of parallelogram land in meters?

Answer: 40*45=1800 (square meters)

1800/75=24 (meters)

Question 14: The area of a triangle is 3.4 square meters, what is the area of a parallelogram that has the same ground and height as it?

Answer: 3.4*2=6.8 (square meters)

Question 15:A rectangular pool is 8.5 meters long, 4 meters wide, and 1.5 meters deep.How many square meters does this pool occupy in the bottom area?

Answer: 8.5*4=34 (square meters)

Question 16: A rectangular wooden box, 12 decimeters long, 8 decimeters wide, and 6.5 decimeters high, if its perimeter markings are painted, how many square decimeters of area is painted?

Answer:12*8+(12*6.5+8*6.5)*2=356(square decimeters)

Question 17:The upper base of a trapezoid is 5 meters, the lower base is 12 meters, and the height is 8 meters, what is its area?

Answer:(5+12)*8=68(square meters)

Question 18:Make a rectangular box,0.8 meters long,.6 meters wide and .4 meters high. What is the minimum amount of material needed to make this box?

Answer: (0.9*0.6+0.6*0.4+0.9*0.4)*2=228 (square meters)

Question 19: How much material is needed to make a square cardboard box with prongs .6 meters long at least?

Answer:0.6*0.6*6=2.16 (square meters)

Question 20: Xiao Ming's school is 1000 meters away, how many hours will it take for him to get back to school if he walks 100 meters every minute?

Answer:1000/100=10(minutes)=1/6 hour 21. The greatest common factor of two numbers is 30,their least common multiple is 180,one of the numbers is known to be 180,find the other number?

Answer: 30

22. From one end of the stadium to the other end of the total length of 96 meters, from one end to the other end of the original every 4 meters to insert a small red flag, and now want to change to every 6 meters to insert a small red flag, how many red flags do not pull out?

Answer: because the stadium is 96 meters long every 4 meters there is a red flag can be known as a *** have 96 divided by 4 = 24 and because the change to every 6 meters a 3 into 4 = 12 2 into 6 = 12 so every four red flags to pull out the 2 24 divided by 2 = 12

23. 25 peaches, 75 oranges, divided into a number of children, the requirement of each person to get the number of peaches, oranges, equal, then up to non-give the number of peaches and oranges, then the most can be given to a number of children. How many children can each child get an equal number of peaches and oranges? How many peaches were given to each child? How many oranges?

Answer: (25,75)=25 (25 is the greatest common divisor of 25 and 75)

25/25=1

75/25=3

The maximum number of children that can be given is 25, and each child receives 1 peach and 3 oranges.

24. Lanlan's parents work abroad and she lives at her grandmother's house. Her mom visits her every 6 days, and her dad travels a long way to see her once every 9 days. How many days can her mom and dad visit her at the same time? How many times can the whole family be together in two months?

Answer:(6,9)=18 days (18 is the least common multiple of 6 and 9)

60/18=3 times ..... .6 days

At least 18 days dad, mom can come to see her at the same time, in two months their family can be reunited 3 times

25.Road buses leave every 6 minutes, 15 road buses leave every 8 minutes, 9 road buses leave every 12 minutes, now all three road bus **** car at the same time from the starting point, at least in how many minutes after the three road buses and then leave at the same time.

Answer: 6=2*3

8=2*2*2

12=2*3*2

3*2*2*2=24

26. 72 decimeters in length, 48 decimeters in width for the greatest common factor is 24 decimeters cut into the largest area of the square tablecloth with the side length of 2 meters and 4 decimeters

Answer: (72÷24) × (48 ÷ 24) = 3 × 2 = 6

You can cut 6 pieces.

27.Auntie watered both the moonflower and the monarch at the same time today.The moonflower is watered every 4 days and the monarch is watered every 6 days , at least how many days later is the watering of both flowers at the same time?

Answer; Find the least common multiple of 4 and 6, which is equal to 24 days

28. There are 30 pieces of cake and 36 oranges, which are distributed to a number of children, each of whom receives the same amount, up to how many children?

Answer: find the greatest common divisor of 30 and 36, which is equal to 6

29. 50 kilograms of upper rice, 60 kilograms of middle rice, and 90 kilograms of lower rice are packed into a number of bags of equal weight, and the various kinds of rice are filled exactly to the end, so that the weight of each bag will be at most how many kilograms?

Answer: find the greatest common divisor of 50.60 and 90, which is equal to 10

30.A bouquet is made of 24 red flowers.36 yellow flowers and 48 purple flowers, to make a bouquet with the same number of flowers in it. What is the maximum number of bouquets that can be made from these flowers?

Answer: find the greatest common divisor of 24.36 and 48, which is equal to 12

31.There is a rectangle whose width is three times its height and the sum of the lengths of the width and height is equal to the length. It is now cut horizontally and then vertically to give 4 small rectangles, increasing the surface area by 200 square centimeters. What is the volume of the original rectangle?

Answer: let the height be a, the width 3a, and the length 4a

Then after cutting it horizontally, the surface area is increased by 2*3a*4a

After cutting it vertically, the surface area is increased by 2*a*3a

24a^2+6a^2=200

a=(20/3)^0.5

Volume v=12a^3= 160/3*(15)^0.5

32.A rectangular fish tank without a lid is 0.4 m long, 0.25 m wide, and 0.3 m deep.What is the minimum number of square meters of glass that will be used to make this fish tank?

Answer: 0.4×0.25+2×0.25×0.3+0.4×0.3

=0.1+0.15+0.24

=0.49 square meters

33. What is the length of the prongs of a square frame folded with 36 cm of wire? If the surface of the frame is glued with paper, at least how many square centimeters of paper will be needed?

Answer: 36÷12=3㎝

6×3×3

=54 square centimeters

34. The volume of a rectangle with a square base, unfolded on its sides to be exactly square, and a height of 8 decimeters.

Answer:

Height of the rectangle = perimeter of the base = 8 decimeters

Length of side of the base of the rectangle = 8 ÷ 4 = 2 (decimeters)

Volume = area of the base × height = 2 × 2 × 8 = 32 (cubic decimeters)

35.Twelve sweets are given to three people equally, what fraction of these sweets does each person get?

12/3=12/3

36.When three identical square blocks are put together to form a rectangle, the surface area is reduced by 120 square centimeters from the original; what is the surface area of the square that is put together?

Answer: 120÷4=30 (square centimeters)

3×4×+1×2=14 (pieces) area of the small square

14×30=420 (square centimeters)

30×6×3=540 (square centimeters)

37. Fill a rectangular sink 24 long, 9 wide and 8 high with water at 6 deep. of water and then put in a square iron block with prongs of length 5, how much did the water level rise

Answer: 5 × 5 × 5 ÷ (24 × 9)

=125 ÷ 216

≈0.5787

38. The sum of the lengths of all the prongs of a square is 84 cm, how many cubic centimeters is its volume? What is the area of the base in square centimeters?

Answer: 84/12=7 (cm)

Volume: 7*7*7= 343 (cubic centimeters)

Base area: 7*7=49 (square centimeters)

39To repair a section of a road, on the first day, you repaired 1/4 of the entire length , and on the second day, you repaired 90 meters, which left 150 meters to be repaired. How many meters is the length of the road?

Answer: The road is X meters long,

1/4X+90+150=X

X-1/4X=90+150

3/4X=240

X=320

40There is a pile of sand at a construction site, and 2/3 of the pile has been used up to the extent that 60 tons have been used up. How many tons of sand were in the pile?

Answer60/2/3=90 (tons)

41Flour of 4250 kg can be ground from 5000 kg of wheat, find the flour yield of wheat.

Answer4250/5000*100%=85%

42The flour yield of wheat is 80%, how many kilograms of wheat will be required to grind 640 kg of flour?

Answer640/80%=800(kg)

43Teacher Wang went to a sports store and bought 5 small soccer balls, he paid 100 yuan and got back 32.5 yuan, how much is each small soccer ball?

Answer (100-32.5)/5=13.5 (yuan)

44The first time the cafeteria bought 25 kilograms of cabbage, and the second time they bought 175 kilograms of cabbage, according to the calculation of 60 cents per kilogram of cabbage, how much money was used to buy cabbage in the cafeteria a ****?

Answer (25+175)*6=1200 (cents)=120 (yuan)

45Xiaohua showed a book to Xiaogang, Xiaohua read 132 pages in 4 days, Xiaogang read 96 pages in 3 days, who read it faster? Why?

AnswerSiao Hua reads faster!

Because Xiaohua: 132/4=33 (pages)

Kang: 96/3=32 (pages)

46The sporting goods store had 72 basketballs, sold 2/3 of them, and bought 45 more.

Answer72*2/3=48 (only)

72-48=24 (only)

24+45=70 (only)

47The length of a rectangle is 0.54 meters, 8 centimeters more than the width, and 5 centimeters high, how many square meters is the area of this rectangle?

Answer0.54 m = 54 cm

54-8 = 46 cm

54*46*5 = 12,420 square centimeters = 1.242 square meters

48A bar of steel is 1 meter long, and when 2/5 of a meter is cut off, how many meters are left?

Answer1-2/5=3/5 meters

49 In an orchard, it is planned to use 2/5 of a plot of land to plant peach trees, 1/3 to plant pear trees, and the rest to plant apple trees. What fraction of the land will be taken up by apple trees?

Answer1-(2/5+1/3)=4/15

50 A rectangular pool is 5 meters long and 3 times as wide as long , how many meters wide is it?

Answer5*3=15 meters! Hope to adopt!

Sakura Naikan 2011-08-11

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900

Other Answers (24)

There are 4 containers weighing 3 tons, 5 containers weighing 2.5 tons, 14 containers weighing 1.5 tons, and 7 containers weighing 1 ton. What is the minimum number of cars with a load capacity of 4.5 tons that can be used to transport the containers all at once?

Solution: (3 x 4 + 2.5 x 5 + 1.5 x 14 + 1 x 7) = 35/3 (cars)

Answer: At least 12 cars with a load capacity of 4.5 tons are needed to carry the containers all at once.

Changshi Li Ka-shing 2011-08-04

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296

1,There are two workshops A and B. If 10 people are transferred from workshop A to workshop B, the number of people in the two workshops is exactly equal; if 20 people are transferred from workshop B to workshop A, the number of people in workshop A is exactly three times that in workshop B. How many people are there in each workshop? How many people are there in each of the two workshops?

B (20 + 20 + 20 × 3) ÷ (3-1) = 50 (people)

A 50 + 20 = 70 (people)

Shangguan Muxue 43 2011-08-12

470

270

1,There are two workshops, A and B. If 20 people are transferred from workshop A to workshop A, then the number of people in workshop A is exactly three times the number of people in each workshop. workshops, if 10 people are transferred from workshop A to workshop B, the number of people in the two workshops is exactly equal; if 20 people are transferred from workshop B to workshop A, the number of people in workshop A is exactly three times that in workshop B. How many people are there in each of the two workshops? How many people are there in each of the two workshops?

Method 1: Solve by equation:

Set the original workshop B has x people, then workshop A has x + 20 people; from the meaning of the equation

(x-20) x 3 = x + 20 + 20

3x - 60 = x + 40

2x = 100<

x = 50

A has 50 + 20 = 70 people

Method 2: Using arithmetic:

B (20 + 20 + 20 × 3) ÷ (3 - 1) = 50 (people)

A 50 + 20 = 70 (people)

2,A . B two people processing parts, A more than B processing 6 parts per day, B stopped on the way for 15 days without processing, 40 days later, B processing the number of parts is exactly half of A. Ask A. B two people each processed how many parts?

Set B processing X per day A processing X + 6 per day

2 * X * 25 = (X + 6)40

X = 24

B processed 1,200 A processed 2,400

3, the school transported 43.2 cubic meters of fine sand, the sand is spread in a length of 12 meters, width of 7.2 meters of the pit, can be paved! How many decimeters thick?

43.2 ÷ 12 ÷ 7.2 = 0.5 m = 5 decimeters

4. A rectangular pool of up to 12.6 tons of water, known pool length 6 meters, 3 meters wide, how many meters deep? (1 cubic meter of water weighs 1 ton. Solve the equation)

Set the depth of water to X meters.

6 × 2 × X = 12.6 × 1

X = 12.6 ÷ 12 = 1.05 meters

5. There is a bottom side of the length of 2 decimeters of the rectangular oil drum, filled with oil into the volume of 500 ml bottles, *** filled with 60 bottles, the oil drum filled with oil depth is what?

500 ml = 0.5 liters

0.5 x 60 ÷ 2^2 = 7.5 decimeters

6 . A rectangular piece of tin, 50 centimeters long and 45 centimeters wide, is stamped into a box by cutting off small squares with side lengths of 10 centimeters from the four corners.How many cubic centimeters of objects can this box hold?

(50-2×10)×(45-2×10)×10= 7500 cubic centimeters

1115922198 2011-08-05

626

295

1, the road construction team to build a road 180 kilometers long, the original 6 kilometers per day to repair, repairing the After 15 days, the team speeds up and builds 7.5 kilometers per day, how many more days will it take to finish the road?

1, (180-6 × 15) ÷ 7.5 = 12 (days)

2, the construction site needs 106 tons of sand, the first 15 times with a small car, each transport 2.4 tons. The rest of the change to a large car, each transport 5 tons, how many more times to finish?

2, (106-2.4 × 15) ÷ 5 = 14 (times)

3, Zhang Li bought "Fables" and "English Humor" each of 4 books, *** pay 20 yuan, 7.6 yuan back, each "Fables" 1.6 yuan, each "English Humor" how many yuan?

3. (20-7.6)÷4-1.6=1.5(yuan)

4. People's Park originally had 30 boats, earning 540 yuan a day. Now there are 15 more boats than there were. How many dollars a day is the income now?

4. 540 ÷ 30 × (30 + 15) = 810 (yuan)

5. The TV factory originally planned to produce 1,680 color TVs in 36 days, and half of them were completed in the first 16 days. The remaining is intended to be completed in 6 days. How many units are produced per day on average?

5. 1680 ÷ 2 ÷ 6 = 140 (units)

1. A factory has a batch of coal that was planned to burn 5 tons per day for 45 days. How many days can this batch of coal be burned when it actually burns 0.5 tons less per day?

1, 5 × 45 ÷ (5-0.5) = 50 (days)

2, the school bought 150 meters of plastic rope, first cut 7.5 meters to make three jump ropes of the same length. According to this calculation, how many more can be made from the remaining plastic rope?

2. (150-7.5) ÷ (7.5 ÷ 3) = 57 (roots)

3. To repair an aqueduct, the original plan was to repair 0.48 kilometers per day for 30 days. How many days did it actually take to repair 0.02 kilometers more per day?

3. 0.48 × 30 ÷ (0.48 + 0.02) = 28.8 (days)

4. Mr. Wang reads a book and finishes it in 15 days if he reads 32 pages a day. Now, if he reads 40 pages a day, how many days ahead can he finish it?

4. 15-32 × 15 ÷ 40 = 3 (days)

5. A car traveled 260 kilometers in 4 hours, and at this speed, it traveled another 2.4 hours, how many kilometers did it travel before and after a ****? (with two ways to answer)

5, 260 ÷ 4 × 2.4 + 260 = 416 (kilometers) 260 ÷ 4 × (4 + 2.4) = 416 (kilometers)

6, Shihe Farms first sent 8 harvesters to participate in the harvesting of late rice, the first 2 days of the harvest of 19.2 hectares, and then increased to 13 harvesters, with the same speed and cut for 4 days, they a *** cut! How many hectares?

6, 19.2 ÷ 2 ÷ 8 × 4 × 13 + 19.2 = 81.6 (hectares)

7, A and B are 600 kilometers away from each other, a bus and a truck at the same time from the A to the B, the bus than the truck 4 hours earlier than the bus to the B, the truck traveled 400 kilometers. How long does it take the bus to cover the entire distance?

7. 600 ÷ [(600-400)÷4]-4 = 8 (hours) or 4 ÷ (600 ÷ 400-1) = 8 (hours)

A and B, 500 km apart, A travels 30 km per hour and B travels 20 km per hour. How many hours will they meet if they start at the same time?

500÷(30+20)=10

1. There are 210 color TVs in the store, which is three times more than the number of black-and-white TVs and 21 more than the number of black-and-white TVs. How many black and white televisions does the store have?

1. 63 units

2. An isosceles trapezoid is formed by a wire 12.4 decimeters long. The two waists of the trapezoid are known to be 6.4 decimeters long and the area is 9 square decimeters. (Use the equation.)

2. 3 meters

3. There are a number of geese and ducks in the river, of which the number of ducks is four times the number of geese. There are 27 more ducks than geese, how many geese and ducks are there?

3. There are 9 geese and 36 ducks

4. There are 2,000 trees to be planted in a forest, and the average number of trees to be planted in the first 3 days is 350 per day. The rest are to be planted in 2 days. How many trees are to be planted per day?

4. 475 trees

Enthusiast 2011-08-13

223

112

1. The sixth graders collected 180 cans, of which 1/3 were collected by Class I and 2/5 by Class II. How many were collected by each of the two classes? (60, 72)

2. Xiaohong weighs 42 kg and Xiaoyun weighs 40 kg. Xiaoxin's weight is equal to 1/2 of the combined weight of Xiaohong and Xiaoyun. how many kg does Xiaoxin weigh? (41)

3. Three classes of sixth graders helped mend books in the library. The first class mended 54 books, the second class mended 5/6 as many books as the first class, and the third class mended 4/3 as many books as the second class. how many books did the third class mend? (60)

4. Xiaoli has 12 more colorful pictures than Xiaolan, which is equal to 3/10 of Xiaolan's pictures. how many colorful pictures does Xiaolan have? How many does Xiaoli have? (40, 52)

5. There are 111 students in the sixth grade, which is equal to 3/4 of the number of students in the fifth grade. how many students are there in the fifth grade and the sixth grade a***? (259)

6, Xiaogang's family bought a bag of flour, ate 15 kilograms, exactly 3/4 of the bag of flour. how many kilograms of flour are left in the bag? (20)

7. There are 30 people in the art group of Bright Elementary School, the number of people in the biology group is 1/3 of the art group, and the number of people in the model airplane group is 4/5 of the biology group. how many people are in the model airplane group? (8)

8, a feedlot raised 2400 geese, the number of geese is 3/4 of the number of ducks, the number of ducks is 4/5 of the number of chickens, how many chickens are raised in the feedlot? (4000)

9. Five students have the same amount of deposits, if each person out of 16 yuan donated to the "Project Hope", the five students remaining money exactly equal to the original three people's deposits. The original deposit per person how much (40)

The following for reference

Hearted users 2011-08-12

211

146

:Sporting Goods have 90 ping pong balls, if every two in a box, can be exactly loaded? If you fill a box with five balls, will you be able to fill the box exactly? Why?