How to solve missing number problems

How many stones?

There are 4 stones in a pack. The path needs 32 stones.

The calculation can be written like this : y × 4 = 32

Division is the opposite of multiplication. Move all the numbers to the opposite (right) side of the equation so you can do division.

y = 32 ÷ 4

32 ÷ 4 = 8

y = 8

To make the path you need 8 packs of 4 stones.

calculation showing y equals 8