Printable 3-Digit Addition Worksheets

This two-page Letter PDF is for students practicing three-digit addition. It includes Name and Date fields, space to line up the hundreds, tens, and ones, and a set of addition problems in a Problem/Answer layout. The worksheet shows problems such as 100 + 122, 524 + 122, 103 + 228, 506 + 347, 112 + 145, and 435 + 245. An answer key is included with each problem and answer listed in a #, Problem, Answer table.

Free printable · PDF

2 pages
US Letter — choose “Fit to page” for A4
PDF, 61 KB

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Free for personal, family and classroom use.

Use the first page for classwork, homework, or independent practice. Students can write the answers in the blank spaces beside each problem, then check their work with the answer key on the second page. Print it on standard Letter paper for easy use at a desk, in a math center, or for take-home review.

Good for

Three-digit addition practice
Math center independent work
Homework with answer key

Tip: Print single-sided so students can work on one page and check answers on the next.

10 files · PDF, DOCX, XLSX

Get every sheet: Addition Worksheets Pack

This sheet plus 9 more in one download, with the editable Word and Excel files. Printable addition worksheets with answer keys: within 10, number lines, within 20, doubles, two-digit with and without regrouping, three-digit, three addends and word problems, plus an Excel fact-fluency tracker.

$5.00 USD, one-time 10 files · about $0.50 each