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Math Grade 2-3 Answer Key

Skip Counting by 2s 5s and 10s

Practice counting patterns with 2, 5, and 10

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Skip Counting by 2s 5s and 10s

Practice counting patterns with 2, 5, and 10

Math - Grade 2-3

Instructions: Read each problem carefully. Write the missing numbers or explain your thinking.
  1. 1

    Count by 2s. Fill in the missing numbers: 2, 4, __, 8, __, 12.

    Add 2 each time.

    The missing numbers are 6 and 10. Counting by 2s gives 2, 4, 6, 8, 10, 12.
  2. 2

    Count by 5s. Fill in the missing numbers: 5, 10, __, 20, __, 30.

    Add 5 each time.

    The missing numbers are 15 and 25. Counting by 5s gives 5, 10, 15, 20, 25, 30.
  3. 3

    Count by 10s. Fill in the missing numbers: 10, 20, __, 40, __, 60.

    The missing numbers are 30 and 50. Counting by 10s gives 10, 20, 30, 40, 50, 60.
  4. 4

    Start at 14 and count by 2s for four more numbers.

    Begin at 14 and keep adding 2.

    The next four numbers are 16, 18, 20, and 22. Each number is 2 more than the one before it.
  5. 5

    Start at 25 and count by 5s for five more numbers.

    The next five numbers are 30, 35, 40, 45, and 50. Each number is 5 more than the one before it.
  6. 6

    Start at 40 and count by 10s for four more numbers.

    Add 10 each time.

    The next four numbers are 50, 60, 70, and 80. Each number is 10 more than the one before it.
  7. 7

    Fill in the missing numbers: 12, 14, __, 18, __, 22. Tell what pattern you used.

    The missing numbers are 16 and 20. The pattern is skip counting by 2s.
  8. 8

    Fill in the missing numbers: 15, __, 25, __, 35, __. Tell what pattern you used.

    Look at how much the numbers increase each time.

    The missing numbers are 20, 30, and 40. The pattern is skip counting by 5s.
  9. 9

    Fill in the missing numbers: __, 20, 30, __, 50, 60. Tell what pattern you used.

    The missing numbers are 10 and 40. The pattern is skip counting by 10s.
  10. 10

    Mia counts socks by 2s. She says 2, 4, 6, 8, 10. How many socks has she counted?

    The last number told is the total counted so far.

    Mia has counted 10 socks. She used skip counting by 2s to count them.
  11. 11

    A student counts nickels by 5s and says 5, 10, 15, 20. How much money is that in cents?

    That is 20 cents. Counting by 5s with nickels gives a total of 20 cents.
  12. 12

    There are 10, 20, 30, and 40 stickers in groups. How many stickers are there in all after the fourth group?

    Look at the last number in the pattern.

    There are 40 stickers after the fourth group. The numbers show skip counting by 10s.
  13. 13

    Write the next six numbers when you count by 2s starting at 6.

    The next six numbers are 8, 10, 12, 14, 16, and 18. Each number is 2 more than the one before it.
  14. 14

    Write the next five numbers when you count by 5s starting at 35.

    Keep adding 5.

    The next five numbers are 40, 45, 50, 55, and 60. Each number is 5 more than the one before it.
  15. 15

    Write the next five numbers when you count by 10s starting at 70.

    The next five numbers are 80, 90, 100, 110, and 120. Each number is 10 more than the one before it.
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