Practice: Missing Number – Math Fun for Kids

Missing Number

Find the missing number in an equation.

★ Choose Your Level:

Easy

(1-10)

Medium

(1-50)

Hard

(1-100)

Expert

(10-500)

☰ How Many Problems?

Quick

Normal

Challenge

Marathon

Did you know?

Finding the missing number is like being a number detective!

You can check your answer by putting it back into the equation.

The same missing number can appear in different types of equations.

Understand Missing Number before you start

Read this if you're new to the topic—it will help you know what to do in each problem.

In these problems, one number in an equation is missing. Your job is to find it by using the numbers you know.

Think about the operation: if you see + and the result, subtract to find the missing part. If you see − or ×, work backward with the inverse operation.

Examples

? + 4 = 10 → 6

7 − ? = 2 → 5

3 × ? = 12 → 4