3rd grade
Four-Digit Addition and Subtraction
Fifteen stacked problems with thousands, hundreds, tens and ones, most with regrouping.
Math worksheet · Addition and subtraction practice
Estimate Sums and Differences
Ten problems to round, estimate and then solve. Kids check that the exact answer is close to the estimate.
- Grade level
- 3rd grade
- Time
- About 25 minutes
- Answer key
- Yes, page 2 of the PDF
- Kids practice
- Addition and subtraction facts, Regrouping, Mental math strategies, Checking with the inverse
What kids do
“Round each number to the nearest ten or hundred. Add or subtract the rounded numbers. Then find the exact answer.”
Printed on the sheet:
- Round to the nearest
Words on this sheet
ProblemhundredtenRounded problemExact answer
Sample problems
- 350 + 318
- 658 + 427
- 212 + 301
Teacher tip
Ask kids to explain why an estimate is useful even when they can find the exact answer.
How to use it
- Let partners check each other with a calculator after they finish.
- Warm up with two minutes of facts out loud before kids start.
- Do the first problem together under a document camera, then let kids finish on their own.
Watch for
Columns that drift. Turn lined paper sideways or use graph paper to keep digits lined up.
Talk about it
- Which answer could you check by doing the opposite operation?
- Which problem was the hardest? What made it hard?
Take it further
Play a dice game: roll two dice, add or subtract, and race to a hundred.
US Letter, prints well in black and white. Free for home and classroom use: print as many copies as you need.
More addition and subtraction practice worksheets
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Subtraction Across Zeros
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Grades K–1
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Grades 1–2
Addition Facts Within 20
Thirty addition facts with sums up to 20, mixed so kids can’t just count on from the last one.
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