2nd Grade Open Number Line Addition Worksheet
Use the open number line to add two-digit numbers by jumping tens, then ones.
- Homework
- Centers
- Review
- Intervention
Download the Free Printable PDF
No sign-up required. Clean, low-ink US Letter format.
- Grade
- 2nd Grade
- Subject
- Math
- Skill
- Addition
- Topic
- adding on an open number line
- Difficulty
- Standard
- Time
- 14 minutes
- Pages
- 2 (incl. answer key)
- Format
- Printable PDF (US Letter)
- Answer key
- Included
- Best for
- homework, centers, review, intervention
Worksheet details
What This Worksheet Practices
Students will add two-digit numbers on an open number line by jumping tens and ones.
- Starting at the first number
- Jumping by tens, then ones
- Landing on the sum
Worksheet Preview
See the strategy behind mental addition
An open number line is a blank line with no marks — students draw their own jumps to add. To solve 34 + 20, start at 34 and make two jumps of ten to land on 54. Adding the tens first, then the ones, is exactly the mental-math strategy second graders are building; the line just makes the thinking visible. Jumps don’t have to be to scale.
How to use it
Have students label the start number, jump forward by tens (big jumps), then by ones (small jumps), and read where they land. Builds on 2-digit addition without regrouping and the place-value idea of adding tens.
👩🏫 Teacher note
Start at the first number, make big jumps of ten, then small jumps of one. The open number line shows the strategy behind mental addition; jumps don't need to be to scale.
🏠 Parent note
Start at the first number on the line. Jump forward by tens, then by ones, and read where you land.
Common Mistakes to Watch For
- Making uneven jumps that don't match the number
- Jumping the wrong amount of tens or ones
Answer Key
Each answer shows the sum (the number you land on).
⬇ Download Answer Key (PDF)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.
2-Digit Addition with Regrouping Worksheet
Practice adding two-digit numbers that require carrying a ten — the heart of second-grade addition.
2-Digit Addition Without Regrouping Worksheet
Add two-digit numbers by adding the ones and the tens separately — no carrying needed yet.
Adding 3 Numbers Worksheet
Add three numbers by looking for a pair that makes ten, then adding the third number.
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