1st Grade Ten More, Ten Less Worksheet
Find 10 more and 10 less than a number by adding or removing one tens rod.
- 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
- Place Value
- Topic
- ten more and ten less
- 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 find 10 more and 10 less than a two-digit number by changing the tens digit.
- Finding 10 more than a number
- Finding 10 less than a number
- Seeing that only the tens digit changes
Worksheet Preview
Adding ten only changes the tens
A powerful place-value insight clicks in first grade: to add ten, you don’t count by ones — you just add one tens rod, and the ones digit doesn’t budge. So 34 + 10 = 44. Seeing this with base-ten blocks turns “ten more” and “ten less” into instant mental math.
How to use it
Start with the base-ten blocks: ten more is one more rod, ten less is one fewer rod. Then move to doing it from the number alone — change the tens digit, keep the ones. Watch for students who count by ones (slow) or change the wrong digit. Builds on tens and ones.
👩🏫 Teacher note
Use the base-ten blocks: ten more means one more rod, ten less means one fewer rod. The ones digit never changes — that insight is the goal.
🏠 Parent note
To add ten, just add one to the tens digit: 34 becomes 44. The ones stay the same.
Common Mistakes to Watch For
- Changing the ones digit instead of the tens
- Counting by ones to add ten
Answer Key
Each answer shows the new number.
⬇ Download Answer Key (PDF)Part of a Practice Pack
Related Worksheets
Place Value: Hundreds, Tens, and Ones Worksheet
Read the hundreds flats, tens rods, and ones units, then write the three-digit number they show.
Place Value: Tens and Ones Worksheet
Count the tens rods and ones units shown by the base-ten blocks, then write the two-digit number.
1st Grade Bar Graph Worksheet
Read the bar graph to find how many for each group, then compare the bars.
1st Grade Fractions: Halves and Fourths
Look at each shape split into equal parts. Tell whether the parts are halves or fourths.
Frequently Asked Questions
Is this worksheet free to download?
Yes. You can download and print this worksheet for free, with no sign-up required.
Does it come with an answer key?
Yes — a complete answer key is included.
Original & reviewed. Every worksheet is created in-house from a grade-level skill brief, checked for a correct answer key, and reviewed for grade-appropriateness. Our editorial policy.