Subtraction Within 20 Worksheets (Grade 1) – Free Printable PDF
Updated: July 2026
A 20-problem subtraction worksheet focused on numbers within 20. Designed for Grade 1 students to practice basic subtraction skills in a simple vertical format.
Free Subtraction Within 20 Worksheet (Grade 1 PDF)
This free printable worksheet helps students practice subtraction within 20 in a simple and structured way. Designed for Grade 1 learners, it uses clear vertical problems to build confidence and improve basic math skills.
What’s Included
- 20 subtraction problems within 20
- Numbers ranging from 10 to 20
- Beginner-friendly format
- Printable PDF for home or classroom use
Why This Worksheet Is Useful
Subtraction within 20 is an essential step in early math learning. This worksheet helps students understand number relationships and develop accuracy through consistent practice.
Perfect For
- Grade 1 students
- Daily math practice
- Homework assignments
- Homeschool learning
Skills Developed
- Basic subtraction fluency
- Number sense
- Improved calculation speed
- Confidence in early math
Download the Free Worksheet
Click the button below to download your printable PDF. Regular practice with subtraction within 20 helps students build a strong foundation for more advanced math concepts.
✏️ Step-by-Step Solving Guide for Grade 1
When solving subtraction problems on this worksheet, guide students using place value strategies:
- Step 1 (Line Up Digits): Always arrange numbers vertically by aligning the Hundreds, Tens, and Ones columns properly.
- Step 2 (Subtract Ones): Start from the rightmost column. If the top digit is smaller than the bottom digit, borrow 1 ten from the tens column (regrouping).
- Step 3 (Complete & Verify): Continue subtracting the tens and hundreds. Check the answer by adding the result back to the subtracted number!
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