Practice Problems — Set 12

2.OA.C.3 · Determine whether a group of objects (up to 20) has an odd or even nu…

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

Warm-up

1. 5 + 6 = ___ 2. 11 − 6 = ___ 3. 33 − 4 = ___

_See printable PDF for diagram._

Written practice

1. Story: 4 apples and 5 more arrive. Total? ___ 2. 9 − 5 = ___ 3. Story: 9 stickers, give away 5. Left? ___ 4. Fill in: 6 + ___ = 12 5. Story: 4 apples and 5 more. Total? ___ 6. Story: 9 stickers, give away 5. Left? ___ 7. Word problem: 32 marbles, lose 3. How many left? ___ 8. 12 − 5 = ___

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More written practice

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

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Patterns and rules

1. 5 + 7 = ___ 2. 12 − 7 = ___ 3. 49 − 4 = ___

_See printable PDF for diagram._

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Parent tip: Draw number bonds or number lines