IXL | Estimate sums and differences by rounding: up to 1,000 | 3rd grade math

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Estimate the sum by rounding each number to the nearest hundred and then adding.

361 + 393

The sum is approximately .

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$Confetti$

Excellent!

Now entering the Challenge Zone—are you ready?

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Teacher tools

Work it out

Not feeling ready yet? These can help:

C.2Round to the nearest ten or hundred

T.3Add a multiple of 10 or 100 to a three-digit number

V.3Subtract a multiple of 10 or 100 from a three-digit number

Lesson: Rounding numbers