Addition · US · Grades 1–3

1st Grade Addition Worksheets

Twenty first-grade addition problems: a two-digit number plus a single digit with no crossing of the ten (43 + 5, 71 + 6), in columns with room to write. The answer key is on page 2.

Problems
20 · 2-Digit Plus 1-Digit Addition without Regrouping
Regrouping
no regrouping
Answer key
Included, same positions
Paper size
US Letter (A4 available)

Worksheet settings

Operation
Number size

The bottom number never has more digits than the top one.

Regrouping (carrying / borrowing)
Problems per page
Layout
Versions
Paper

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2-Digit Plus 1-Digit Addition without Regrouping20 problems · no regroupingName:Date:Score: ______ / 20printmathsheets.com · free printable, with answer key · seed 101001Page 1 of 21.335+2.526+3.105+4.816+5.804+6.235+7.654+8.536+9.808+10.532+11.708+12.924+13.962+14.553+15.772+16.451+17.723+18.363+19.303+20.615+

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

About this worksheet

This is the grade 1 standard (adding within 100 without composing a ten). For addition facts within 20 in large print see the kindergarten section; for crossing the ten, use the 2-digit plus 1-digit sheet with Regrouping on "Some problems".

Standards

  • Common Core 1.NBT.C.4 — add within 100 without composing a ten
  • Common Core 1.OA.C.6 — add within 20

Questions

What addition should a first grader know by the end of the year?

Facts within 10 from memory, strategies for facts within 20, and two-digit plus one-digit (and multiples of ten) with place-value understanding.