Free · Printable · TEKS 1.3C,1.3D
Free Grade 1 Subtraction Within 20 Worksheets
995+ Texas TEKS-aligned practice questions on subtraction within 20. Print at home or practice online with a built-in AI tutor. No sign-up. No paywall.
Looking for subtraction within 20 worksheets for Grade 1? This page has 995+ TEKS-aligned practice questions on this exact topic, mapped to Texas TEKS 1.3C,1.3D. Every question goes through an AI quality gate before publishing — no typos, no wrong answer keys, no factually-broken explanations.
Subtract within 20 using strategies and basic facts.
Below: a sample of 8 questions with answers and explanations so you can see what's on the worksheet before you print. Each question has the correct choice marked and a one-line "why" so kids who get it wrong understand the fix.
4 take away 3 is what?
- 2
- 3
- 0
- 1 ✓
Why: 4 − 3 = 1.
8 − 4 = ?
- 4 ✓
- 3
- 5
- 6
Why: 8 − 4 = 4.
What number is 4 less than 6?
- 3
- 2 ✓
- 4
- 1
Why: 6 − 4 = 2.
Subtract 5 from 7.
- 1
- 3
- 2 ✓
- 4
Why: 7 − 5 = 2.
17 take away 15 is what?
- 1
- 4
- 3
- 2 ✓
Why: 17 − 15 = 2.
Find the difference: 19 − 11.
- 7
- 10
- 8 ✓
- 9
Why: 19 − 11 = 8.
20 − 15 = ?
- 4
- 6
- 5 ✓
- 7
Why: 20 − 15 = 5.
Find the difference: 13 − 2.
- 11 ✓
- 10
- 13
- 12
Why: 13 − 2 = 11.
Common questions
Are these worksheets really free?
Yes. Free to print, free to practice online. No email, no sign-up, no paywall. We make money from optional paid features (toy redemption with real cents), not from the worksheets.
What is TEKS 1.3C,1.3D?
TEKS 1.3C,1.3D is the Grade 1 Subtraction Within 20 standard from the Texas Essential Knowledge and Skills. Subtract within 20 using strategies and basic facts.
How many total questions are available?
995+ questions in our Grade 1 Subtraction Within 20 bank. Print as many 20-question worksheets as you like — each one pulls a fresh set so your kid doesn't see the same questions twice.
Where do these questions come from?
Generated by our AI pipeline, then quality-gated by two independent models (gpt-4o for content review, Claude Sonnet 4.5 for math verification) before publishing. Every question is tagged to TEKS 1.3C,1.3D and modeled on real STAAR item shapes.