Formula:
4- 1=3
33.6÷3= 1 1.2 (yuan)
1 1.2×4=44.8 (yuan)
Think about solving problems:
Aunt Zhang bought more than four times as many apples as Aunt Li, that is to say, the kilogram of apples was three times more, and she paid 33.6 yuan more, so the money for a kilogram of apples was 33.6÷3= 1 1.2 yuan, which is how much Aunt Li spent on apples. Aunt Zhang spent 1 1.2×4=44.8 yuan on apples.
Check calculation:
44.8- 1 1.2=33.6 (yuan) is calculated correctly.
Multiply means that an integer can be divisible by another integer and this integer is a multiple of another integer. Note: you can't call a number a multiple alone, you can only say who is a multiple of who. For an integer m (except 0) divisible by n (m/n), then m is a multiple of n. Relatively speaking, n is called a factor of m. For example, 15 is divisible by 3 and 5, then 15 is a multiple of 3 and 5.