Students add and subtract plays on a football field to practice working with negative and positive integers on the number line.

Practice adding two-digit numbers by making tens on Khan Academy. If you are stuck, watch a refresher video or choose to get a hint. Test yourself to see how many you can get correct!

Practice adding and subtracting mixed numbers with common (like) denominators. Some items require regrouping. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.

Practice adding and subtracting mixed numbers with different denominators. No regrouping required. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.

Students will be challenged in their skills to add 2-digit numbers by making tens

Practice adding and subtracting mixed numbers with different denominators. Regrouping required. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.

This site is provided for by Visual Fractions. Add mixed numbers with like denominators using circles. Click on the "Explain" button to understand the answer.

Practice solving addition and subtraction problems with integers (positive and negative numbers). Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.

This video tutorial reviews how to add mixed numbers with like and unlike denominators. The lesson includes detailed examples.

Students watch a video lesson about adding mixed numbers. The tutorial includes detailed examples that demonstrate two methods for solving.

Practice adding and subtracting mixed numbers with common (like) denominators. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.

Practice adding and subtracting mixed numbers.

A good refresher of how to perform addition of real numbers. Covers how to add numbers of same sign and of the different sign, and how to find the additive inverse of a number. View several example problems and step-by-step solutions and...

[Free Registration/Login may be required to access all resource tools.] This lesson covers the powers of i, and adding and subtracting complex numbers, as well as how to plot them in the complex plane. Students examine guided notes,...

Add, subtract, multiply and divide complex numbers using these easy-to-follow examples.

[Free Registration/Login may be required to access all resource tools.] A collection of resources that explain complex numbers and how to do arithmetic with them.

Practice adding positive and negative single-digit numbers. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.

Practice matching number line diagrams to addition expressions involving negative numbers. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.

A lesson for students to practice adding integers, defining rational number, and placing rational numbers on a number line. Included on the page is videos and documents to help execute the lesson.

In this activity, students learn to build and add two digit numbers. They connect number words and numerals.

Practice identifying equivalent expressions involving the addition and subtraction of negative numbers. 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 add mixed numbers that have the same denominators. Includes video demonstrating a sample problem [1:36] and a set of practice...

Practice adding and subtracting rational numbers of different forms.

In this exercise, students practice adding two-digit numbers by making tens. Students receive immediate feedback and have the opportunity to get hints and try questions repeatedly.