Practice Problems — Set 12

K.OA.A.3 · Decompose numbers to 10

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

Warm-up

1. Talk through today's focus: Decompose numbers to 10 2. Try one oral example together before writing. 3. Use the diagram to explain your thinking.

_See printable PDF for diagram._

Written practice

1. 7 = ___ + ___ 2. Show two ways to make 6 with a drawing. 3. Fill in: 7 = 3 + ___ 4. Use two colors on a ten-frame for 8. 5. Write another equation for 4: ___ + ___ = ___ 6. Which is greater: the parts or the whole? Explain. 7. Explain your thinking for set 12 in one sentence. 8. Create your own problem for K.OA.A.3.

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More written practice

1. Apply Decompose numbers to 10 (item 9, set 12): show your work. ___ 2. Apply Decompose numbers to 10 (item 10, set 12): show your work. ___ 3. Apply Decompose numbers to 10 (item 11, set 12): show your work. ___ 4. Apply Decompose numbers to 10 (item 12, set 12): show your work. ___ 5. Apply Decompose numbers to 10 (item 13, set 12): show your work. ___ 6. Apply Decompose numbers to 10 (item 14, set 12): show your work. ___

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Patterns and rules

1. Teen numbers are 10 and some ones. 2. Partners that make 10 help with quick facts. 3. The whole equals the sum of the parts.

_See printable PDF for diagram._

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Parent tip: Shake and spill counters on a ten-frame