1. The product of 5.04 × 2.1 is ( ) decimals; the quotient of 22.6 ÷ 0.33, retaining one decimal is about ( ).
2, will Retain two decimal places is ( ), retain three decimal places is ( ).
3. Fill in the circles below with ">" "<" or "="
3.25 × 0.98 3.25 A ÷ 0.97 A (A≠0)
0.75÷0.5 0.75×2
4. A student's identity card number is 510402199703155221, the student was born on ( ) month ( ) day of ( ) year, and his gender is ( ).
5. Xiaolin buys 4 pens at a yuan each; and 5 exercise books at b yuan each. The amount of money a *** pays can be expressed by the equation ( ); when a = 2.5 and b = 0.5, a *** should pay out ( ) yuan.
6. Move the decimal point of a decimal two places to the right to get a new number that differs from the original number by 44.55; the original number is ( ).
7, Mr. Wang processing a kind of parts, 5 minutes processing 20, then Mr. Wang processing an average of 1 parts need ( ) minutes, 1 minute can process this kind of parts ( ).
8. The three sides of a right triangle are 3 centimeters, 4 centimeters, and 5 centimeters, and the area of this right triangle is ( ) square centimeters.
9. The upper base, lower base and height of a right-angled trapezoid are 10dm, 12dm and 8dm respectively, its area is ( ) square decimeters; draw a maximum square inside the trapezoid, the area of the square is ( ) square decimeters.
10. A box contains 6 balls labeled with the numbers 1, 2, 3, 4, 5 and 6. Touch any one of them, there are ( ) possibilities, the probability of each outcome occurring is ( ), the probability of it being an odd number is ( ) and the probability of it being less than 3 is ( ).
Two, fire eyes, I'll judge. (5 points)
1. a2 and 2a mean the same thing. ( )
2. When you multiply two numbers, the product must be greater than any of the factors. ( )
3. A rectangle made of four wooden slats nailed together and pulled into a parallelogram keeps its perimeter and area the same. ( )
4. 9.999999 is a recurring decimal. ( )
5. All equations are equations, but all equations are not necessarily equations. ( )
3. Carefully scrutinize, I'll choose. （5分）
1、Each empty bottle can hold 2.5 kilograms of salad oil, Mr. Wang wants to put 25.5 kilograms of salad oil in such bottles, at least ( ) such bottles are needed.
A, 10 B, 11 C, 12
2, the following shapes can not be close-packed ( )
A, a square pentagon B, a square hexagon C, a square triangle
3, a box put 15 balls, including 5 red balls, 2 green balls, 7 black balls, 1 yellow ball, from the box
Touch any ball, touch the box
The probability of red ball is ( ). The probability of touching a red ball is ( ) and the probability of touching a yellow ball is ( ),
A. B. C. D.
4. The teacher's house is in building 06, unit 3, 08 floor 3 in the happy neighborhood. if F is used to denote the happy neighborhood, the number of the teacher's house
is ( )
A .F-06 -3-08-3 B. F-3-06-3-08 C. F-6 -3-8-3
5. In the figure on the right, two triangles A and B (indicated by shading) are drawn in two squares with equal side lengths, and their
areas are compared with each other ( )
A. A's area is larger B. B's area is larger C. Equal
Four, carefully review the problem, I can calculate. (40 points)
1. Write the score directly (5 points)
3.5×0.1= 3.6÷0.09= 200×0.04= 12÷1.2= 1.3×0.5=
0.42÷0.6= 3.2×0.5= 0.21×0.3= 2.5×1.4= 5.5÷11=
2, Calculate in vertical form (6 points)
0.73×2.15 7.38÷1.6
3. Calculate each of the following problems, and simplify them if you can. (12 points)
8.4×0.26 + 0.74 5.5×17.3 + 2.7×5.5
31.7-0.5×0.7-1.65 0.8×(3.2-2.99÷2.3)
4, Solve the equation (12 points)
7 -2 × 9 = 81 7 + 5 = 42
13 -7.5 = 19.25 (32- )× 6 = 108
5. Hands-on, I can do it.
(1) Please connect them. (3 points)
(2) Please draw the picture shapes seen from different directions. (2 points)
Left: Right:
(3) Find the area of the shaded part in meters (5 points)
VI. Problem solving, I can do it. (25 points)
1. school art festival, prepared a garland and colorful ball each 20, *** spent 100 yuan, colorful ball each 3.5 yuan, garland each how many yuan?
2. A piece of land in the shape of a parallelogram, with a base length of 250 meters and a height of 68 meters, *** harvested 3400 kg of rapeseed. On average, how many kilograms of rapeseed are produced per hectare?
3, the Spring Festival is approaching, a supermarket purchased 540 small Chinese knots, than the purchase of large Chinese knots 4 times less than 60, the supermarket purchased how many large Chinese knots? (with the equation)
4, the orchard has peach trees and pear trees **** 480 trees, the number of pear trees is three times the number of peach trees, how many peach trees, pear trees in the orchard? (Solve the equation)
5, Xiaoming's home in the first half of last year, the monthly electricity consumption is as follows (electricity consumption unit: kWh)
Months 1 2 3 4 5 6
Electricity consumption/kWh 81 85 65 55 47 63
1, the first half of the average monthly electricity consumption is how many kWh?
2. What is the median of these figures?