1st Grade Counting to 120 Worksheet
Fill in the missing numbers as you count to 120 — including the tricky jumps past 100.
- Homework
- Morning Work
- Centers
- Review
- Intervention
Download the Free Printable PDF
No sign-up required. Clean, low-ink US Letter format.
- Grade
- 1st Grade
- Subject
- Math
- Skill
- Counting
- Topic
- counting and number order to 120
- Difficulty
- Standard
- Time
- 12 minutes
- Pages
- 2 (incl. answer key)
- Format
- Printable PDF (US Letter)
- Answer key
- Included
- Best for
- homework, morning work, centers, review, intervention
Worksheet details
What This Worksheet Practices
Students will count, read, and write numbers to 120, filling in missing numbers in a sequence.
- Counting in order to 120
- Filling missing numbers in a sequence
- Crossing into a new ten and past 100
Inside This Printable
Student directions: Write the missing numbers in each sequence. Count carefully past 100.
Worked example
108, 109, ___, 111 -> the missing number is 110.
Sample questions
- 78, 79, ___, 81
- 108, 109, ___, 111
- 115, 116, ___, ___, 119
The PDF contains 8 practice questions plus 2 challenge questions.
Worksheet Preview
Counting all the way to 120
First grade extends counting past 100, all the way to 120. The numbers themselves are easy to write — the tricky part is the decade changes: knowing that 99 is followed by 100, and 109 by 110. Steady practice through those transitions builds the place-value sense behind every bigger number.
How to use it
A 120 chart is the perfect companion — have your child point and count aloud, slowing down at 100, 110, and 120. Watch for digit reversals past 100. Builds on counting to 20 and supports place value.
👩🏫 Teacher note
The tricky spots are the decade changes (99 to 100, 109 to 110). A 120 chart is a great companion; have students point and count aloud through those transitions.
🏠 Parent note
Count out loud together, especially around 100, 110, and 120. Then fill in the blanks.
Common Mistakes to Watch For
- Stumbling at the change to a new ten (e.g., 99 to 100, 109 to 110)
- Reversing digits in numbers past 100
Answer Key
Each answer lists the missing numbers.
⬇ Download Answer Key (PDF)Related Worksheets
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Yes — a complete answer key is included.
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