Practice Problems — Set 13

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 15 objects. Count them as you write the numeral. 3. Count from 10 to 46 by tens aloud.

_See printable PDF for diagram._

Written practice

1. Write the next numbers: 13, 14, ___, ___, ___ 2. Fill in: 10, 20, ___, 40, ___, 60 3. Write the numeral: sixteen → ___ 4. Complete by ones: 15, 16, ___, 18 5. What comes after 23? ___ 6. What comes before 24? ___ 7. Write the next numbers: 44, 45, ___, ___, ___ 8. Write the next numbers: 45, 46, ___, ___, ___ 9. Write the next numbers: 46, 47, ___, ___, ___ 10. Fill in by tens: 40, 50, ___, 60, ___

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More written practice

1. Fill in by tens: 45, 55, ___, 75 2. Write every tenth number from 40 to 80. 3. Start at 44 and write the next six numbers. 4. Write numerals from 44 to 52 in order.

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Patterns and rules

1. What rule: 13, 14, 15, 16 → 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.