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Decimal Operations

Grade 5 · 10 worksheets

About this skill

Decimals are whole-number arithmetic with one extra discipline: respect the place value. These worksheets cover adding and subtracting to the hundredths, multiplying, and dividing decimals, with money problems, word problems for every operation, and estimate-then-solve pages that force a reasonableness check. Students line up decimal points, annex zeros where they help, and learn that a decimal answer can be checked the same way as any other — by asking whether it makes sense.

Teaching notes

Anchor hundredths in money: dimes are tenths, pennies are hundredths, and most students already trust that system.
The big mistake is lining numbers up on the right like whole numbers instead of lining up decimal points. Grid paper or a drawn place-value line fixes alignment fast.
Require the estimate out loud first — “about 6 plus about 4, so near 10” — before any exact computation.