Counting by 10s Worksheets for 1st Grade
Fill in the missing number in a count-by-10s sequence, starting from a ten or from any number (like 7, 17, 27). 15 free printable worksheets, each with an answer key.
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Click a worksheet to open the PDF, or grab the matching answer key. Every sheet prints on one page.
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Worksheet #15
Counting by 10s: what children learn
Counting by 10s is the fastest of the early skip-counting patterns and connects directly to place value — each jump of 10 just increases the tens digit by one.
Counting by 10s: worked example
40, 50, __, 70, 80 60
Each number is 10 more than the last, so the missing number is 50 + 10 = 60.
Counting by 10s: a common mistake to watch for
Kids occasionally miscount when jumping by 10 near a tricky boundary (like from 97 to 107) — remembering that only the tens digit changes, and the ones digit stays the same, catches this quickly.
Counting by 10s: how to help at home or in class
Put ten pennies, buttons or dry beans into small cups until you have several cups. Touch each cup and say the next number in the pattern, 10, 20, 30, and so on. Whisper the ones digit and say the tens digit loudly to hear the pattern. Then ask what comes after 50 without the cups. Once your child can say the tens fluently up to 100, adding whole tens is a natural next step.
What is on these Counting by 10s worksheets
This set has 15 different worksheets for 1st grade, with 16 questions on each and a matching answer key for every sheet. The instruction printed on each worksheet is: “Find the pattern and write the missing number.”
Example questions like the ones on these worksheets, with their answers:
- 73, 83, __, 103, 11393
- 5, 15, __, 35, 4525
- 40, __, 60, 70, 8050
- 0, 10, __, 30, 4020
- 20, 30, __, 50, 6040
- 54, 64, __, 84, 9474
- 61, __, 81, 91, 10171
- 60, __, 80, 90, 10070
Every answer on every sheet is checked by a separate program before the worksheet is published. How we check answers