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Finding Sum With Rounding Worksheets

These worksheets help students develop estimation skills by combining rounding and addition concepts. Students round numbers to the nearest ten or hundred before finding sums, building essential mental math abilities. Each worksheet contains 10 problems that strengthen computational fluency and number sense.

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3rd Grade

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Word rounding

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Finding Sum with Rounding

About these worksheets

These worksheets combine rounding and addition by asking students to round numbers to the nearest ten or hundred before adding. This builds mental math and estimation skills that students use throughout elementary math and beyond. Students practice deciding which place value to round to and then finding an estimated sum.

Finding Sum With Rounding Worksheets - Finding Sums with Rounding worksheet

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Finding Sums with Rounding

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Practice rounding numbers to the nearest ten or hundred.
Decide which place value to round to based on what the problem asks.
Add the rounded numbers to find an estimated total.
Read word problems and pick out the numbers that need to be added.

Finding Sum With Rounding Worksheets - Estimating Sums and Differences by Rounding (Word Problems) worksheet