Kindergarten · Grade 1 · US

Subtraction Within 20 Worksheets

Twenty subtraction problems within 20, including the facts that cross ten (15 − 7, 13 − 8) which first graders learn by "taking from ten" or by thinking of the related addition fact. Large print with answer boxes; the answer key is on page 2.

Problems
20 · Subtraction within 20
Print
Large type, answer boxes
Answer key
Included, same order
Paper size
US Letter (A4 available)

Worksheet settings

Operation
Numbers up to

Sums never go past this number; subtraction starts from it at most.

Problems per page
Layout
Versions
Paper

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Subtraction within 2020 problems · large printName:Date:Score: ______ / 20printmathsheets.com · free printable, with answer key · seed 200200Page 1 of 21.20–18=2.16–11=3.19–5=4.18–2=5.11–3=6.14–1=7.20–13=8.18–9=9.17–13=10.19–9=11.10–9=12.18–15=13.20–15=14.14–7=15.7–7=16.2–2=17.7–4=18.16–15=19.2–1=20.18–12=

Page 1 of 2 · US Letter · 0.5″ margins. The PDF prints at exactly this layout.

About this worksheet

For a shorter session choose 10 or 12 problems; for kindergarten, lower the limit to 10. The Mixed operation puts addition and subtraction within 20 on one page.

Standards

  • Common Core 1.OA.C.6 — add and subtract within 20, demonstrating fluency within 10
  • Common Core 1.OA.B.4 — subtraction as an unknown-addend problem

Questions

What does "crossing ten" mean?

A subtraction like 15 − 7, where the answer is below 10 and the starting number above it. Children learn to take 5 first (down to 10), then 2 more.