Rounding and Estimation Word Problems

3rd Grade MathPlace Value4 pages

About this worksheet

Six rounding and estimation stories for 3rd grade, all pinned to Common Core 3.NBT.1. Maya's 47 bake-sale cookies and Leo's 73 pages handle the nearest ten, a 348-book library donation and 682 cans of pet food handle the nearest hundred, and the closing pair asks for estimates: a $28 soccer ball plus a $43 jersey, then the gap between 512 Friday visitors and 289 Saturday visitors. Show-your-thinking lines follow the first problems, and the key writes out each rounding decision digit by digit.

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$Rounding and Estimation Word Problems: Place Value - page 1$

$Rounding and Estimation Word Problems: Place Value - page 2$

$Rounding and Estimation Word Problems: Place Value - page 3$

$Rounding and Estimation Word Problems: Place Value - page 4$

Curriculum objectives covered

3.NBT.1

“Use place value understanding to round whole numbers to the nearest 10 or 100.”

Every problem: questions 1 to 4 round single values (47, 73, 348, 682), and questions 5 and 6 use rounding as the entry step of an estimate.

What's inside this worksheet

Rounding to the Nearest 10

Students round Maya's 47 cookies (with a line to explain the decision) and Leo's 73 weekend pages, one rounding up and one rounding down.

Rounding to the Nearest 100

A library donation of 348 children's books and an animal shelter's 682 cans of pet food each get rounded, again split between a round-down and a round-up.

Estimate and Solve

Problem 5 rounds a $28 soccer ball and a $43 jersey to the nearest ten before adding to $70. Problem 6 rounds 512 and 289 to the nearest hundred and subtracts for an estimate of 200 more Friday visitors.

How teachers use it

Context practice

Assign it once bare rounding is secure. The same skill inside Maya's cookie count tells you who can find the number worth rounding in a paragraph.

Estimation debate

After problem 5, ask whether the real total of $71 is more or less than the $70 estimate and why. One dollar of error is a concrete way into estimate quality.

Number-line support

For students still unsure, sketch 40 and 50 as endpoints and place 47 between them before question 1. The worksheet's show-your-thinking line has room for the sketch.

More 3rd Grade Math worksheets

Multiplication and Division Fractions Measurement and Data Geometry

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