Practice Problems — Set 18

3.OA.B.6 · Understand division as an unknown-factor problem

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

Warm-up

1. 5 × 4 = ___ 2. 20 ÷ 4 = ___ 3. Draw an array for 4 rows of 5. Total? ___

_See printable PDF for diagram._

Written practice

1. Two-step: Start with 13, add 3, then subtract 1. Result? ___ 2. Explain your thinking for this word problem in one sentence. 3. Draw an array for 3 rows of 4. Total? ___ 4. Groups: 4 bags with 5 each. Total? ___ 5. Share 48 equally among 3 friends. Each gets ___ 6. Create your own word problem for 3.OA.B.6. 7. Groups: 4 bags with 5 apples each. Total? ___ 8. Share 48 stickers equally among 3 friends. Each gets ___

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More written practice

1. Draw an array for 3 rows of 5. Total? ___ 2. Groups: 4 bags with 6 each. Total? ___ 3. Share 54 equally among 4 friends. Each gets ___ 4. Missing factor: ___ × 4 = 12 5. 2 × 3 = ___ 6. 6 ÷ 3 = ___

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Patterns and rules

1. 5 × 5 = ___ 2. 25 ÷ 5 = ___ 3. Draw an array for 5 rows of 5. Total? ___

_See printable PDF for diagram._

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Stretch

1. Two-step: Start with 13, add 3, then subtract 1. Result? ___ 2. Explain your thinking for this word problem in one sentence.

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Parent tip: Draw arrays for multiplication