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

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...

Help keep the carnival parade safe by helping officer Davi with his addition and subtraction!

Students complete a series of learning exercises to practice addition and subtraction.

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.

The purpose of this task is for learners to practice creating and memorizing subtraction equations while focusing on missing addends. After modeling the activity with the whole class, this game would be perfect for centers and small groups.

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.

In this exercise, students practice addition and subtraction word problems 2. Students receive immediate feedback and have the opportunity to get hints and try questions repeatedly.

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

Watch a short video on the relationship between addition and subtraction then assess your knowledge with practice questions.

In this exercise, students practice subtraction word problems within 10. Students receive immediate feedback and have the opportunity to get hints and try questions repeatedly.

Represent multi-step word problems using equations with a letter standing for the unknown quantity. Equations include addition, subtraction, multiplication, and division. Students receive immediate feedback and have the opportunity to...

Use estimation to solve multi-step word problems involving addition, subtraction, multiplication, and division. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.

By the end of this section, you will be able to understand the rules of vector addition and subtraction using analytical methods, apply analytical methods to determine vertical and horizontal component vectors, and apply analytical...

Learn how to simplify expressions involving the addition and subtraction of radicals.

[Free Registration/Login may be required to access all resource tools.] In this learning module, students must solve two-step word problems about metric capacity using addition and subtraction. The process is demonstrated in the...

[Free Registration/Login may be required to access all resource tools.] For this learning module, students are asked to solve word problems involving the addition and subtraction of metric units of capacity. Includes video demonstrating...

Practice matching addition and subtraction equations to real-world scenarios. 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.] 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...

Practice writing addition and subtraction equations to match number line diagrams. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.

Practice finding the missing value in an addition or subtraction equation involving negative numbers.

Practice solving more challenging word problems with addition and subtraction. Numbers used are 20 or less.

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