Counting to 100 Worksheets for 1st Grade
Fill in the missing number in a counting sequence up to 100. 15 free printable worksheets, each with an answer key.
Save to PinterestFree Counting to 100 Worksheets
Click a worksheet to open the PDF, or grab the matching answer key. Every sheet prints on one page.
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Counting to 100: what children learn
Counting all the way to 100 by ones is a core 1st grade milestone — it builds the number sense that later skip-counting and place-value work depends on.
Counting to 100: worked example
87, 88, __, 90, 91 89
Each number is one more than the number before it, so the missing number is 88 + 1 = 89.
Counting to 100: a common mistake to watch for
Kids often stumble crossing a "decade" boundary (like from 89 to 90) — extra practice right around those transitions helps.
Counting to 100: how to help at home or in class
A hundred chart on the fridge gives you a daily game: cover a few numbers with sticky notes and have your child name what is hiding. Reading the chart row by row also shows how each row ends in a zero and how the next row starts fresh. Count steps on a walk to see how far a hundred really is. When your child can fill gaps anywhere on the chart, they are ready to skip count by tens.
What is on these Counting to 100 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:
- 53, 54, 55, __, 5756
- 67, 68, 69, __, 7170
- 70, 71, 72, __, 7473
- 23, __, 25, 26, 2724
- 86, __, 88, 89, 9087
- 71, __, 73, 74, 7572
- 1, 2, __, 4, 53
- 75, 76, 77, __, 7978
Every answer on every sheet is checked by a separate program before the worksheet is published. How we check answers