In this exercise, students practice one-step equations with addition and subtraction. Students receive immediate feedback and have the opportunity to get hints and try questions repeatedly.

In this exercise, students practice one-step addition and subtraction equations with fractions and decimals. Students receive immediate feedback and have the opportunity to get hints and try questions repeatedly.

As related to cryptography, understanding the concept of modular addition and modular subtraction and finding the proof.

Practice adding and subtracting to solve word problems. Numbers used are 20 or less. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.

[Free Registration/Login may be required to access all resource tools.] The video shows how to compare numbers in a word problem using multiple operations to find given values and the solutions to the questions posed in the problem. The...

[Free Registration/Login may be required to access all resource tools.] The video describes how to break down a subtraction statement to determine if the statement should be more or less than. The video is followed by a series of...

Complete this step by step lesson to estimate the sum and difference then test yourself.

Practice solving more challenging word problems with addition and subtraction. Numbers used are 20 or less. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.

Solve problems step by step by addition with regrouping.

[Free Registration/Login may be required to access all resource tools.] The video shows how to solve a word problem with addition and subtraction. The video is followed by a series of practice questions to assess student comprehension of...

[Free Registration/Login may be required to access all resource tools.] The video shows how to solve a word problem with addition and subtraction of two-digit numbers. The video is followed by a series of practice questions to assess...

[Free Registration/Login may be required to access all resource tools.] The video is a 2 part word problem using addition and subtraction. The video is followed by practice problems to assess student understanding of the concept.

Practice solving word problems with negative numbers. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.

Learn how to add and subtract rational expressions.

[Free Registration/Login may be required to access all resource tools.] A video and practice questions on word problems involving intervals of time. [0:44]

Practice adding and subtracting to solve word problems. Numbers used are 20 or less.

This lesson covers adding and subtracting rational expressions when the denominators are the same.

[Free Registration/Login may be required to access all resource tools.] Here you'll learn how to add and subtract polynomials, as well as learn about the different parts of a polynomial. Practice problems are also included.

On this interactive site students learn to solve subtraction problems using a formal algorithm and to apply place value concepts.

This site provides students practice with the concept of mental addition. Students can learn about the topic by completing an interactive tutorial. Students can then take a ten question timed test to practice the skill.

On this interactive site students learn to write 2-digit numbers, count forward and backward by tens and show subtraction facts.

[Free Registration/Login may be required to access all resource tools.] In this learning module, students are presented with an equation where the operation signs are missing. They must find the correct order of addition and subtraction...

The goal of this task is to have students derive the addition and subtraction formulas for cosine and tangent, and the subtraction formula for cosine, from the sum formula for sine. Aligns with F-TF.C.9.

By using like radicals, expressions are easily simplified using addition and subtraction. Examples are provided to demonstrate how to simplify radicals to create like terms.