Add and Subtract to Find the Missing Number

In this activity, we will be finding the missing number in a calculation.

Example

Find the missing number in the calculation:

134 + ___ + 22 = 160

Answer

Step 1:   Add together 134 + 22 = 156.

Step 2:   Work out what you need to reach 160 by calculating 160 - 156 = 4

So,

134 +  4  + 22 = 160

Does that make sense?

In this activity, we are going to be number detectives and find the missing number!