These worksheets will teach your students how to use rounding to determine sums and differences.

We use estimation for a number of different reasons, but it requires us to realize that the answer we come to is not exact. This helpful for plan a wide area of things. Maybe you have decided to build a deck in your backyard, and you want to get an idea of how much planks of wood you need or how many boxes of deck screws you will need. This is where estimation comes to the rescue. To estimate the operations that are undergoing addition or subtraction we round their value to the nearest tens, hundreds, or thousands place value. Which ever value is present at the greatest value. If that place value is five or greater, we round it up. If the value is four or less, we round down. This selection of worksheets has students creating their own sum and difference problems. This is a really great idea to do whenever it applies to the math you are working with. This really engages students and gives them something to work for. This skill will most likely be used by students all the time. It gives us a really solid clue as to if the answer we determined is actual true.

These worksheets explain how to estimate the sums and difference of whole numbers, decimals, and mixed fractions. Step-by-step solutions to sample problems are provided. The later worksheets move away from integers and work on visual cues as a indicator. Rounding in order to solve the problem. Problems may be addition or subtraction. These problems will include whole numbers, decimals, and fractions.

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Creating Addition Problems Lesson

This worksheet explains how to create an addition problem based on a given answer. A sample problem is solved.

Review and Practice

A sample creating addition problem is solved. Two practice problems are provided.

Practice

Create an addition problem based on the given answer.

Worksheet

This will require some thought on your part.

Creating Addition Problems

Eight answers are given develop a number statement that makes sense for you.

Warm Up

Student will create addition problems based on a given answer. Three problems are provided.

Estimate the Sum Lesson

This worksheet explains how to estimate the sum of a problem. A sample problem is solved.

Estimate the Difference Review and Practice

A sample estimating the difference problem is solved. Two practice problems are provided.

Estimating Sums Worksheet

Estimate the sum of each problem. Ten problems are provided.

Practice

Students will practice estimating the sums of 2-digit numbers. Ten problems are provided.

Practice With Sums and/or Differences

Estimate the sum or difference of each problem.

Practice Estimating Sums and Differences

A series of rapid fire problems for you. Twenty-five problems are provided.

Warm Up

Students will estimate sums and differences of 2-digit numbers. Three problems are provided.

Estimating Sums Visually Lesson

This worksheet explains how to estimate the sum visually. A sample problem is solved.

Estimating Differences Visually Review and Practice

A sample problem estimating the difference visually is solved. Two practice problems are provided.

Estimating Sums and Differences Visually Worksheet

Ten sets of pictures are provided. Students will estimate the sums or differences visually as indicated.

Practice

Students will estimate the sums or differences visually as indicated. Ten problems are provided.

Estimating Sums and Differences Visually Drill

Students will demonstrate their ability to estimate the sums or differences visually as indicated. Eight problems are provided.

Visual Warm Up

Student will solve three addition or subtraction problems involving pictures. Three problems are provided.

Estimating Sums of 4-digit Numbers Lesson

Estimate first by rounding the numbers to the nearest hundred. Then calculate the exact answer.

Review and Practice

First estimate the numbers by rounding the given numbers to the nearest hundred. Estimating 7857 to the nearest hundred gives 7900. Estimating 2851 to the nearest hundred gives 2900. Then add the estimated numbers to get the answer i.e.

Estimating Sums of 3 and 4-digit Numbers Worksheet

Estimate first by rounding the numbers to the nearest hundred. Then calculate the exact answer.

Practice

Students will estimate the sums of each pair of numbers by rounding them up. Ten problems are provided.

Numbers Drill

Students will demonstrate their ability to estimate the sum of 3 and 4-digit numbers. Eight problems are provided.

Estimating Sums of 3 and 4-digit Numbers Warm Up

Students will estimate the sums to three problems. Addends are 3 and 4-digit numbers.

Estimating the Difference of Whole Numbers Lesson

We need only estimated answers. We round off (Nearest value to make calculation easy) of the given number and then solve the given expression, to get estimated result. Here, we don’t need to calculate the exact answer.

Estimating the Sum of Whole Numbers Lesson and Practice

This worksheet explains how to estimate the sum of whole numbers. A sample problem is presented and solved step by step. Two similar practice problems are provided.

Estimating Sums and Differences

Students will estimate answers to simple problems by rounding numbers to the nearest tenth. Ten problems are provided.

Worksheet

Who doesn't need more work on this skill?

Practice

Students estimate the answers to simple addition/subtraction problems. Includes eight problems.

Warm Up

Students study the numbers provided and estimate their sums or differences. Three problems are provided.

Estimating the Difference of Decimals Lesson

This worksheet explains how to estimate the difference of decimals. The step-by-step solution to a sample problem is provided.

Estimating the Sum of Decimals Lesson and Practice

This worksheet explains how to estimate the sum of decimals. A sample problem is presented and solved step by step. Two similar practice problems are provided.

Practice With Decimals

Students will estimate answers to simple problems involving decimals. Ten problems are provided.

Decimals Worksheet

Students will estimate answers to problems involving decimals. Ten problems are provided.

Decimals Practice

Students estimate the answers to simple addition/subtraction problems involving decimals. Includes eight problems.

Warm Up

Students study the decimals provided and estimate their sums or differences. Three problems are provided.

Estimating the Sum of Fractions Lesson and Practice

This worksheet explains how to estimate the sum of fractions. A sample problem is presented and solved step by step. Two similar practice problems are provided.

Practice My Fractions

Students will estimate answers to simple problems involving fractions. Ten problems are provided.

Fractions Worksheet

Students will estimate answers to problems involving fractions. Ten problems are provided.

Mixed Fractions Lesson

A sample problem is presented and solved step by step. Six similar practice problems are provided.

Mixed Fractions Quiz

Students will demonstrate their proficiency in estimating sums and differences of mixed fractions. Ten problems are provided

Mixed Fractions Skill Check

Students estimate the sum of or difference of three problems. Space is provided to copy the correct answer when it is given.