Find the Missing Number

Front

Find the unknown number: __ + 11 = 19

Back

8

Front

Find the unknown number: __ + 11 = 23

Back

12

Front

Find the unknown number: 19 + __ = 23

Back

4

Front

What missing number will make the equation true? 15 − 4 = ____ + 9

Back

2

Front

What missing number will make the equation true? 10 − 4 = ____ + 2

Back

4

Front

What is the term for a number that makes an equation true?

Back

Missing Number

Front

What is addition?

Back

Combining two or more numbers to get a total.

Front

What is subtraction?

Back

Taking one number away from another.

Front

What is an equation?

Back

A mathematical statement that two expressions are equal.

Front

What does it mean to 'find the missing number'?

Back

To determine the unknown value in an equation.