Addition · US · Grades 1–3

2-Digit Plus 1-Digit Addition Worksheets

Twenty problems adding a single digit to a two-digit number, in columns, with about half the problems crossing a ten (47 + 8) and half not (43 + 5). This is the first-grade step between addition facts and full two-digit column addition. The answer key is on page 2.

Problems
20 · 2-Digit Plus 1-Digit Addition
Regrouping
some regroup
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 Addition20 problems · with and without regroupingName:Date:Score: ______ / 20printmathsheets.com · free printable, with answer key · seed 210001Page 1 of 21.461+2.497+3.931+4.751+5.408+6.499+7.807+8.599+9.616+10.452+11.355+12.125+13.714+14.557+15.221+16.376+17.308+18.414+19.941+20.663+

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

About this worksheet

Choose "None" under Regrouping for sums that stay inside the ten, or "Every problem" to drill crossing the ten — the "make a ten" strategy with written numbers.

Standards

  • Common Core 1.NBT.C.4 — add within 100, including a two-digit number and a one-digit number
  • Common Core 1.OA.C.6

Questions

Is this the same as addition within 20?

No: the two-digit number goes up to 99, so most problems are beyond 20 and practise place value as well as facts.