Practice Problems — Set 17

K.CC.A.1 · Count to 100 by ones and by tens

Print and write your answers in the blanks. Use the diagrams to explain your thinking.

Count together

1. Count from 1 to 20 aloud with a parent. 2. Draw 19 objects. Count them as you write the numeral. 3. Count from 10 to 54 by tens aloud.

_See printable PDF for diagram._

Written practice

1. Write the next numbers: 17, 18, ___, ___, ___ 2. Fill in: 10, 20, ___, 40, ___, 60 3. Write the numeral: five → ___ 4. Complete by ones: 19, 20, ___, 22 5. What comes after 27? ___ 6. What comes before 28? ___ 7. Write the next numbers: 56, 57, ___, ___, ___ 8. Write the next numbers: 57, 58, ___, ___, ___ 9. Write the next numbers: 58, 59, ___, ___, ___ 10. Fill in by tens: 30, 40, ___, 50, ___

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More written practice

1. Fill in by tens: 35, 45, ___, 65 2. Write every tenth number from 30 to 70. 3. Start at 57 and write the next eight numbers. 4. Word problem: You have 37 blocks and get 1 more. How many now? ___

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Patterns and rules

1. What rule: 17, 18, 19, 20 → add ___ each time. 2. Counting by tens (10, 20, 30): what do we add each time? ___ 3. Circle the rule: (A) add 1 each time (B) add 10 each time — for 5, 6, 7, 8 4. Explain in one sentence: How is counting by tens different from counting by ones?

_See printable PDF for diagram._

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Parent tip: Touch each object once while saying one number. Writing numerals builds fluency.