Practice Problems — Set 13
1.OA.B.4 · Understand subtraction as an unknown-addend problem
Print and write your answers. Use diagrams to show thinking.
Warm-up
1. 5 + 6 = ___ 2. 11 − 6 = ___ 3. 29 − 5 = ___
_See printable PDF for diagram._
Written practice
1. 4 + 5 = ___ 2. Story: 9 stickers, give away 5. Left? ___ 3. 28 − 4 = ___ 4. Word problem: 28 marbles, lose 4. How many left? ___ 5. Story: 4 apples and 5 more. Total? ___ 6. Story: 9 stickers, give away 5. Left? ___ 7. 3 + 5 = ___ 8. Story: 4 birds, 5 fly away. How many remain? ___
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More written practice
1. 31 − 3 = ___ 2. Story: 4 apples and 5 more arrive. Total? ___ 3. Story: 3 apples and 5 more. Total? ___ 4. Story: 8 stickers, give away 5. Left? ___ 5. 6 + 5 = ___ 6. 11 − 5 = ___
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Patterns and rules
1. 5 + 4 = ___ 2. 9 − 4 = ___ 3. 45 − 5 = ___
_See printable PDF for diagram._
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Parent tip: Draw number bonds or number lines