Addition · Math worksheet

Addition Within 20 Worksheets

Name:Date:Addition Within 20 Worksheets1.10+42.1+143.10+14.7+25.7+136.9+17.4+108.6+49.14+510.19+111.11+212.7+013.2+314.2+715.0+1216.1+1517.6+1418.11+919.13+720.18+121.3+922.18+223.8+1124.17+225.17+326.5+227.12+728.0+229.2+430.0+15
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Thirty addition problems with sums up to 20: the facts first and second graders are expected to know by heart. Many of them cross ten, like 8 + 5, which is where making ten helps.

Shapes
Denominators
fromto

The bottom numbers, from 2 to 12. 2 to 4 keeps to halves, thirds and fourths.

Digits

Base-ten blocks go up to 3 digits: hundreds, tens and ones.

Clocks
Layout
Paper
Numbers0 to 20 and 0 to 20, sums up to 20
First number
fromto
Second number
fromto

Leave at 0 for no limit. 10 makes “addition within 10”.

Regrouping

Carrying and borrowing, for addition and subtraction.

For a classOne sheet, answer keys

Each sheet has its own problems: one per student or one per day.

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2 pages: 1 to solve, 1 with the answers

Ideas for using these sheets

  • Teach the make-ten trick first: 8 + 5 is 8 + 2 + 3.
  • Time one sheet on Monday and a different one on Friday, and write both times at the top.
  • Let children check their own work against the answer key with a colored pencil.

Every setting can be changed above before you print, and “New problems” makes a fresh sheet as often as you like.

Addition Within 20 Worksheets: printable math worksheet with 30 problems and an answer key, from a free math worksheet generator

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