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Rounding to 10 and 100
Grade 3 - Math - On Level
Worksheet 1
1Round 377 to the nearest ten.
2Round 310 to the nearest hundred.
3Which two tens does 635 fall between?
4Which two hundreds does 254 fall between?
5Which digit decides how 547 rounds to the nearest hundred?
6Round 473 to the nearest ten.
7Round 740 to the nearest hundred.
8Which two tens does 522 fall between?
9Which two hundreds does 201 fall between?
10Which digit decides how 345 rounds to the nearest hundred?
About this worksheet
Rounding helps third graders estimate with numbers that are easier to use mentally. The skill is not simply chopping off digits; students must decide which benchmark a number is closest to. The hardest cases are halfway values and numbers where the tens and hundreds decisions differ. This worksheet rotates between rounding to the nearest ten, rounding to the nearest hundred, choosing the two benchmarks around a number, and explaining which digit controls the decision. Number-line visuals appear when they show the interval and hide no answer. Support versions use numbers far from the halfway point. Standard and challenge versions include closer calls. Encourage your child to name the two possible rounded numbers first, then decide which one is nearer. Each question names the rounding target so students attend to tens or hundreds on purpose.
What your child will learn
Round numbers to the nearest ten
Round numbers to the nearest hundred
Use halfway points on a number line
Choose estimates from place-value clues
Worked example
347 rounds to 350 to the nearest ten because it is closer to 350 than 340.
Common mistake
Changing every digit after the rounded place without checking which benchmark is closer.
Helpful hint
Find the two benchmarks, then choose the closer one.