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3rd Grade Rounding & Estimating Worksheets

3rd Grade Rounding & Estimating: round to the nearest 10 or 100 and use rounding to estimate answers. Every worksheet is free, prints as a PDF with an answer key, and can be assigned online. The ones teachers open most are first.

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3rd Grade Rounding & Estimating Worksheets - Rounding to Tens & Hundreds worksheet

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Rounding to Tens & Hundreds

3nbt1

Student objectives

Round whole numbers to the nearest ten or hundred.
Use the ones and tens digits to decide whether to round up or down.

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3rd Grade Rounding & Estimating Worksheets - Rounding to Tens with Numberline worksheet

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Rounding to Tens with Numberline

3nbt1

Student objectives

Round a whole number to the nearest ten.
Use a number line to see which two tens a number falls between.
Decide which ten is closer by comparing the distance on the number line.
Handle halfway cases (numbers ending in 5) by rounding up to the next ten.

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3rd Grade Rounding & Estimating Worksheets - Rounding to Hundreds with Numberline worksheet

Load up one problem at a time! Ideal for projectors, tablets and computers.

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Rounding to Hundreds with Numberline

3nbt1

Student objectives

Round a number to the nearest hundred by deciding which hundred it is closest to.
Use a number line to see where a number falls between two hundreds.
Find the midpoint between two hundreds and use it to choose which way to round.

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3rd Grade Rounding & Estimating Worksheets - Finding Sums with Rounding worksheet

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Finding Sums with Rounding

3nbt1

Student objectives

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.

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3rd Grade Rounding & Estimating Worksheets - Estimating Products (×) worksheet

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Estimating Products (×)

3nbt1

Student objectives

Practice rounding numbers to make multiplication problems easier to do in your head.
Estimate a product by multiplying the rounded numbers.
Use compatible numbers (easy-to-multiply numbers) to get a quick estimate.
Choose the best estimate when there are several possible answers.

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3rd Grade Rounding & Estimating Worksheets - Finding Rounding Amount worksheet

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Finding Rounding Amount

3nbt1

Student objectives

Figure out which numbers could round to a given number at a certain place value.
Use place value to decide the cutoff point where a number rounds up or rounds down.
Find the smallest and largest numbers that would round to the same result.

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3rd Grade Rounding & Estimating Worksheets - Finding Sum with Rounding worksheet

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Finding Sum with Rounding

3nbt1

Student objectives

Practice rounding numbers to a nearby ten or hundred to make them easier to add in your head.
Learn to spot “friendly” numbers you can make by rounding before you add.
Estimate the total of two numbers quickly without doing exact pencil-and-paper addition.
Decide whether to round up or round down by looking at the digit in the next place.

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3rd Grade Rounding & Estimating Worksheets - Estimating Sums and Differences by Rounding (Word Problems) worksheet

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Estimating Sums and Differences by Rounding (Word Problems)

3nbt1

Student objectives

Round each number to the given place value before adding or subtracting.
Estimate sums and differences to the nearest ten, hundred, thousand, or ten thousand.
Recognize when an estimate is useful instead of an exact answer.

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More 3rd grade topics

Multiplication & Division Facts 59 Equivalent & Comparing Fractions 16 Understanding Multiplication & Division 14 Understanding Fractions 13 Area 10 Telling Time & Elapsed Time 24 Bar Graphs & Line Plots 14 Two-Step Word Problems 10 Adding & Subtracting Within 1,000 10 Fractions on a Number Line 5 Properties of Multiplication 13 Perimeter 7 Multiplying by Multiples of 10 3 Shapes & Polygons 5 Liquid Volume & Mass 4 Patterns & Function Machines 5

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