Practice Problems — Set 2

1.OA.B.4 · Understand subtraction as an unknown-addend problem

Print and write your answers. Use diagrams to show thinking.

Warm-up

1. 6 + 4 = ___ 2. 10 − 4 = ___ 3. 18 − 6 = ___

_See printable PDF for diagram._

Written practice

1. Word problem: 17 marbles, lose 5. How many left? ___ 2. 11 − 6 = ___ 3. Story: 5 birds, 6 fly away. How many remain? ___ 4. Fill in: 8 + ___ = 12 5. Story: 5 apples and 6 more. Total? ___ 6. Story: 11 stickers, give away 6. Left? ___ 7. Story: 5 apples and 6 more arrive. Total? ___ 8. 10 − 6 = ___

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More written practice

1. Story: 11 stickers, give away 6. Left? ___ 2. Fill in: 8 + ___ = 10 3. Story: 4 apples and 6 more. Total? ___ 4. Story: 10 stickers, give away 6. Left? ___ 5. 3 + 6 = ___ 6. 9 − 6 = ___

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Patterns and rules

1. 6 + 5 = ___ 2. 11 − 5 = ___ 3. 34 − 6 = ___

_See printable PDF for diagram._

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Parent tip: Draw number bonds or number lines