Kindergarten · Grade 1 · US

Addition and Subtraction Within 20 Worksheets

Twenty problems within 20, alternating addition and subtraction, in large print with a box for each answer. Mixed sheets stop children from adding on autopilot — the sign comes first. The answer key is on page 2.

Problems
20 · Addition and Subtraction to 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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Addition and Subtraction to 2020 problems · large printName:Date:Score: ______ / 20printmathsheets.com · free printable, with answer key · seed 202020Page 1 of 21.4+7=2.7–1=3.10+3=4.13–9=5.10+5=6.6–0=7.7+3=8.16–4=9.5+6=10.14–4=11.4+0=12.10–3=13.14+1=14.17–2=15.2+5=16.16–12=17.6+5=18.11–2=19.11+6=20.17–6=

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

About this worksheet

This is the grade 1 fluency sheet. For kindergarten, set Numbers up to 10 and 12 problems. Two to four versions in one file give each row of desks a different sheet.

Standards

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

Questions

Are the operations in a pattern?

They alternate: odd-numbered problems add, even-numbered subtract. The numbers are shuffled, so every problem still has to be read.