Practice Problems — Set 3
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. 4 + 6 = ___ 2. 10 − 6 = ___ 3. 24 − 3 = ___
_See printable PDF for diagram._
Written practice
1. 7 + 5 = ___ 2. Story: 7 birds, 5 fly away. How many remain? ___ 3. 23 − 6 = ___ 4. Story: 7 apples and 5 more arrive. Total? ___ 5. Story: 7 apples and 5 more. Total? ___ 6. Story: 12 stickers, give away 5. Left? ___ 7. 6 + 5 = ___ 8. Story: 12 stickers, give away 5. Left? ___
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More written practice
1. 26 − 5 = ___ 2. Word problem: 23 marbles, lose 6. How many left? ___ 3. Story: 6 apples and 5 more. Total? ___ 4. Story: 11 stickers, give away 5. Left? ___ 5. 5 + 5 = ___ 6. 10 − 5 = ___
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Patterns and rules
1. 4 + 7 = ___ 2. 11 − 7 = ___ 3. 40 − 3 = ___
_See printable PDF for diagram._
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Parent tip: Draw number bonds or number lines