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3rd Grade Addition Worksheets

19 3rd grade addition worksheets. Teacher favorites: Triple Digit Addition Regrouping Worksheet and Third Grade Math Test Practice Worksheet. How teachers use these

3rd Grade Addition Worksheets

19 3rd grade addition worksheets. Teacher favorites: Triple Digit Addition Regrouping Worksheet and Third Grade Math Test Practice Worksheet. How teachers use these

Worksheet
Worksheet3rd GradeTriple Digit Addition Regrouping Worksheet

This triple digit addition regrouping worksheet gives 3rd graders fifteen three-digit column addition problems that all practice carrying across places. A complete answer key is included for fast, no-prep math review.

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Worksheet3rd GradeThird Grade Math Test Practice Worksheet

This Third Grade Math Test Practice Worksheet gives students 10 multiple-choice questions on place value, addition, and subtraction, with a complete answer key for fast, no-prep review.

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Worksheet3rd GradeAdding and Estimation Worksheet

Third graders round three-digit numbers to the nearest hundred to estimate each sum on this Adding and Estimation Worksheet, then add to find the actual total. Includes an answer key—great for quick, no-prep math practice.

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Worksheet3rd GradeAdd/Subtract Estimation Worksheet

This add/subtract estimation worksheet helps 3rd graders round to the nearest ten and hundred to estimate sums and differences. Includes an answer key for quick, no-prep rounding and estimation practice.

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Worksheet3rd GradeSnack Bar Money Worksheet

This Snack Bar Money Worksheet gives 3rd graders a real menu to add up, from two-item orders to a three-item money puzzle. Answer key included, so practice adding dollars and cents takes no prep.

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Worksheet3rd GradeFind the Total Price Worksheet

Use this find the total price worksheet to give 3rd graders four snack-shop orders to add and one spending problem to reason through. Answer key included, so money practice takes no prep.

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Worksheet3rd GradeGraphing Fruits Worksheet

The Graphing Fruits Worksheet has 2nd grade students solve four addition facts, color a bar graph with their answers and read it to answer three questions, with a full answer key.

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Worksheet3rd GradeMeasurement Word Problems Worksheet

This measurement word problems worksheet gives 3rd Grade students five story problems to solve by adding or subtracting, then labeling each answer with its unit. Answer key included.

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Worksheet3rd GradeFind the Total Price Pictures Worksheet

This Find the Total Price Pictures Worksheet has 3rd graders add two price tags to find each total. Answer key included for quick, no-prep money and addition practice.

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Worksheet3rd GradeTrue Math Sentences Worksheet

This True Math Sentences Worksheet asks 3rd graders to balance eight number sentences, judge four more as true or false, and explain one answer. Answer key included for quick, no-prep equality practice.

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Worksheet3rd GradeSolving Mixed Review Word Problems Worksheet

This solving mixed review word problems worksheet gives 3rd Grade students four story problems that mix addition, subtraction, multiplication and division, plus a work box and an answer key, so choosing the right operation becomes automatic.

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Worksheet3rd GradeTime Estimation Worksheet

This time estimation worksheet helps 3rd grade students pick the better estimate for everyday activities and add estimated minutes. An answer key is included, so checking work takes seconds.

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Worksheet3rd GradeEstimation Multiple Choice Worksheet

This estimation multiple choice worksheet has 3rd graders round to the nearest ten to estimate sums and differences in five bubble-answer story problems, plus two write-and-explain items. Answer key included for fast checking.

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Worksheet3rd GradeMaking Cents Adding Decimals Worksheet

The Making Cents Adding Decimals Worksheet lets 3rd grade students write coin values as decimals and add them in columns, with an answer key included for quick checking and confident money skills.

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Worksheet3rd GradeThree Addends Worksheet

This three addends worksheet gives 3rd grade students six column problems and three word problems that add three numbers with regrouping. An answer key is included, so checking the work takes seconds.

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Worksheet3rd GradeThree Digit Addition Worksheet

Practice with this three digit addition worksheet, where every problem regroups. Six column problems and three word problems for 3rd grade, with an answer key, build accuracy that lasts.

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Worksheet3rd GradeAdding Perimeters Worksheet

This adding perimeters worksheet has 3rd graders find the perimeter of two rectangles or squares and add them for a total. An answer key is included for quick, easy checking.

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Worksheet3rd GradeTwo Digit Addition Worksheet

This two digit addition worksheet has 3rd graders read a farm stand chart and add three or four two-digit numbers in a column. An answer key is included to make checking quick.

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Worksheet3rd GradeSnack Bar Payment Worksheet

The Snack Bar Payment Worksheet has 3rd grade students read a snack bar menu, add prices in dollars and cents, and solve a multi-step money story problem. An answer key is included, so checking takes seconds.

From our teachers' playbook

Bigger numbers, braver mathematicians

What do 3rd graders learn about addition?

Third grade is when addition grows up! Kids add fluently within 1,000, regrouping across the ones and the tens: 486 + 257 = 743. They use place value strategies, round to the nearest ten or hundred to estimate, and check whether an answer makes sense. They also tackle two-step word problems with money, measurement and graphs. The click comes when kids estimate first, say "about 750," and then catch their own mistakes before you do.

Our go-to moves for 3rd grade addition

Regrouping across two places trips up lots of third graders. These moves keep it concrete and keep it coming back.

Trade it with base-ten blocks

Build both numbers with blocks, push them together, and make every trade out loud: "Twelve ones? Trade ten for a rod!" Do it once with blocks, then once with quick sketches, then on paper. Kids who can show the trade rarely forget to carry.

Why it works: the U.S. Department of Education's guide for teaching elementary math recommends moving from hands-on objects to drawings to numbers.

Triple Digit Addition Regrouping WorksheetTry it withTriple Digit Addition Regrouping WorksheetWorksheetsOpen it →

Estimate first, then talk it out

Before anyone solves, ask "About how much?" and take three guesses. After solving, partners explain whether the real answer is close to the estimate. That one habit catches more careless errors than any reteach.

Why it works: when kids say the precise math words, their understanding gets sharper, a recommendation of the U.S. Department of Education's elementary math guide.

Adding and Estimation WorksheetTry it withAdding and Estimation WorksheetWorksheetsOpen it →

Sing the facts warm

Big addition falls apart when single-digit facts are shaky. Start math with one adding song a day. Two minutes of singing gets those facts automatic so kids can spend their brainpower on regrouping.

Why it works: a catchy, repeating tune gives the brain a hook to hang words on, so sung text is remembered better (Wallace, 1994).

Adding Songs (Lyric Video Collection)Try it withAdding Songs (Lyric Video Collection)SongsOpen it →

3rd grade addition questions

What addition should a 3rd grader know?

Third graders should add within 1,000 fluently, including regrouping in the ones and tens places. They should also round to estimate and solve two-step word problems. Single-digit facts should be automatic by now.

How do I help my child with regrouping in 3rd grade?

Use something they can trade, like pennies and dimes or bundled straws. When the ones add up to ten or more, physically trade ten ones for one ten. Once the trade makes sense, the written carry makes sense too.

Why do 3rd graders estimate before adding?

Estimating gives kids a target to check against. If 298 + 405 comes out as 603, an estimate of about 700 tells them something went wrong. It builds number sense, not just steps.

How can I practice 3-digit addition at home?

Add up grocery receipts, compare sports scores, or plan a pretend shopping trip with a budget. A few real problems a day beats a long worksheet session. Printable worksheets help when you want quick, focused practice.