HUNTERTUTORING

Practice Problems — Set 20

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4.OA.B.4 · Find all factor pairs for a whole number in the range 1-100

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

Warm-up

1. Talk through today's focus: Find all factor pairs for a whole number in the range 1-100 2. Try one oral example together before writing. 3. Use the diagram to explain your thinking.

_See printable PDF for diagram._

Written practice

1. 2 × 5 = ___ 2. 10 ÷ 5 = ___ 3. Draw an array for 5 rows of 4. Total? ___ 4. Groups: 6 bags with 5 each. Total? ___ 5. Share 52 equally among 3 friends. Each gets ___ 6. Missing factor: ___ × 6 = 12 7. Explain your thinking for set 20 in one sentence. 8. Create your own problem for 4.OA.B.4.

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More written practice

1. Apply Find all factor pairs for a whole number in the range 1-100 (item 9, set 20): show your work. ___ 2. Apply Find all factor pairs for a whole number in the range 1-100 (item 10, set 20): show your work. ___ 3. Apply Find all factor pairs for a whole number in the range 1-100 (item 11, set 20): show your work. ___ 4. Apply Find all factor pairs for a whole number in the range 1-100 (item 12, set 20): show your work. ___ 5. Apply Find all factor pairs for a whole number in the range 1-100 (item 13, set 20): show your work. ___ 6. Apply Find all factor pairs for a whole number in the range 1-100 (item 14, set 20): show your work. ___

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Patterns and rules

1. Multiplication counts equal groups. 2. Division can mean sharing or forming equal groups. 3. Arrays show rows × columns.

_See printable PDF for diagram._

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Stretch

1. Create your own 4.OA.B.4 question for a parent to solve. 2. Explain your method in two sentences.

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Parent tip: Draw arrays for multiplication

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