Solve Problems Involving +/- (Missing Numbers)

Use what you know about addition and subtraction number facts to help you solve these problems.

Remember addition is the opposite of subtraction.

Example 1 =>111 – ? = 107
You could count on from 107 to 111 to get 4.

Example 2 => You could find the missing number by doing 90 – 75 = 15.
Check your answer by doing 75 + 15 and making sure it makes 90

Now try a few practice questions!