Addition · US · Grades 1–3

3-Digit Addition Without Regrouping Worksheets

Twenty three-digit addition problems in which no column adds to 10 or more, so the whole exercise is lining up hundreds, tens and ones and adding each column. Use it when three-digit numbers are new (late grade 2) and before three-digit regrouping. The answer key is on page 2.

Problems: 20 · 3-Digit Addition without Regrouping
Regrouping: no regrouping
Answer key: Included, same positions
Paper size: US Letter (A4 available)

About this worksheet

Switch Regrouping to "Some problems" when the class is ready to decide column by column, and to "Every problem" for the week carrying across hundreds is taught.

Standards

Common Core 2.NBT.B.7 — add within 1000 using place value
Common Core 2.NBT.A.1 — understand hundreds, tens and ones

Questions

Can a 3-digit sum without regrouping go over 1,000?

No. With no carry in the hundreds column, the sum stays below 1,000.

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