In this number seventeen/eighteen worksheet, learners problem solve and calculate the answers to forty addition and subtraction equations involving the numbers seventeen and eighteen.

In this number nine worksheet, learners problem solve and calculate the answers to forty addition and subtraction equations involving the number nine.

In this addition and subtraction word problems learning exercise, students examine, analyze and develop a variety of word problems solving skills involving both addition and subtraction.

In this math worksheet, students practice finding the missing numbers in a subtraction problem. There are 90 subtraction problems which are written horizontally, most with 2 digits. The answers are shown, but there is a missing number in...

For this mathematical subtraction worksheet, students problem solve eighty equations involving the skill of subtraction of two and three digit numbers.

In this math worksheet, students find the missing numbers in 90 subtraction problems with 2 or 3 digits. The differences are provided but there are missing numbers in each problem. No strategies or examples are given.

Students develop useful strategies for mental calculation when estimating possible addition solutions. They mentally perform calculations involving addition and subtraction. Students state the estimated sum or difference between numbers.

Students are going to stations to solve a specific subtraction problem on a butterfly notecard. They are to record their station number, write down the problem, and show their work on their own sheet of paper. At the end of the station...

First graders use manipulatives, flash cards, number sentences and story problems to practice their addition and subtraction facts to twenty.

In this Cyberchase video segment, the CyberSquad helps resolve a dispute about the squares on the Gollywood Walk of Fame.

College professor Dan Bach offers a review of various basic topics in arithmetic, pre-algebra, and algebra. Order of operations, exponents, square roots, variables, and combining terms are just a few of the many topics covered.

Test your arithmetic skills in addition, subtraction, multiplication and division problems. There are 13 levels and the test may be taken with or without a timer.

In this video segment from Cyberchase, through addition and regrouping in base sixty, Matt helps Digit figure out what time his CyberSouffle will be done.

Seventh graders explore what happens to a hot air balloon when they add or remove units of weight or heat. This activity is an informal exploration of addition and subtraction with positive and negative integers.

[Free Registration/Login may be required to access all resource tools.] Practice problems involving addition or subtraction of 3 measurements to solve for a specific length.

Assess your knowledge of adding, subtracting, multiplying, and dividing fractions with a game of jeopardy.

In this activity, students explore the operations of addition and subtraction. They use estimation, a place value chart, and a calculator to place seven randomly generated numbers in the ones and tens position in a place-value chart to...

[Free Registration/Login may be required to access all resource tools.] In this lesson students solve applications that involve adding and subtracting rational expressions. Students watch a video tutorial, explore guided notes and...

Create and print your own flashcards by selecting a skill and number range from 1-20. Choose from addition, subtraction, multiplication, or division.

This Skillswise site focuses on subtraction. Included are a video about why learning to subtract is important, fact sheets and worksheets for instruction, quizzes on the information presented, and games to practice the skill. Be aware...

Practice solving word problems by subtracting small numbers (numbers 10 or less). Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.

Simple word problems challenge your subtraction skills. If you get stuck, use the clues and the number line for help.

[Free Registration/Login may be required to access all resource tools.] The video [0:34] describes how to add and subtract measurements of length from a given word problem. The video is followed by practice problems covering the topics...

[Free Registration/Login may be required to access all resource tools.] The video describes how to solve a two-digit subtraction problem without regrouping. The video is followed by additional problems for students to practice the skills...