Example: 1a

There are 148 students at Sun Primary school. 101 of them are girls. How many students are boys?

Explanation:

In the above problem, the total number of students at Sun Primary school is 148 and the number of girls at the school is 101. Therefore, the number of boys at the school is 148 - 101 = 47

Example: 2a

How many eggs were left unused if the family used 124 of the 188 eggs they had purchased during the month?

Explanation:

In the above problem, the total number of eggs purchased is 188 and the number of eggs used is 124. Therefore, the number of eggs unused is 188 - 124 = 64 eggs.

Example: 3a

Joe had 189 balloons. He burst 153 of them. How many balloons are left?

Explanation:

In the above problem, the number of balloons Joe had is 189 and the number of balloons he burst is 153. Therefore, the number of balloons left is 189 - 153 = 36 balloons