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MISSING NUMBERS

Find the missing number in addition, subtraction, and multiplication sentences.

L2L3

Section 1 / 2

FINDING THE MISSING NUMBER

A missing number problem has a gap you need to fill: _ + 5 = 12. To solve it, use the inverse (opposite) operation. Since adding 5 gives 12, subtract 5 from 12: 12 − 5 = 7. The missing number is 7!

_ + 5 = 12

1What plus 5 equals 12?

212 − 5 = 7

3So _ = 7

= 7

_ × 3 = 15

1What times 3 equals 15?

215 ÷ 3 = 5

3So _ = 5

= 5

LEADER TIP

Cover one number with a card. This makes 'algebra' concrete and non-threatening - it's just a hiding game!

BEFORE THIS LESSON, TRY

🔢Number Patterns

PRACTICE WITH THESE GAMES

❓Missing Number ⏰Missing Number Sprint 🧱Equation Builder

Want more practice? Generate printable worksheets with similar problems.

Go to Worksheets

CONTINUE WITH:

⚖️Balance Equations

MISSING NUMBERS

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