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

A complete explanation of complex numbers that includes lessons on adding, subtracting, multiplying, and dividing them, as well as more advanced topics.

In this interactive, use logic to solve riddles involving a wallaby jumping contest. Add two consecutive jumps and place them on a number line, finding equivalent fractions and common denominators to do so. Backward jumps represent...

Students learn how to add mixed numbers with like fractional parts.

In this interactive, students add and subtract plays on a football field to practice working with negative and positive integers on the number line. Each set of randomized drives consists of seven to nine plays and ends with a touchdown....

[Free Registration/Login Required] This fun decimal addition worksheet introduces students to the world of operations with decimal numbers. Fifth graders use models to visualize the addition of numbers in the tenths and hundredths places...

Explains how to add two-digit numbers by focusing on each column of digits as you add, rather than the entire numbers.

Learn how to add double-digit numbers in this lesson complete with examples, rules, and vocabulary.

This task challenges a student to demonstrate fluency in adding and subtracting whole numbers.

A description of the complex plane is given with examples of how to plot complex numbers. Also included is an explanation of how to add complex numbers graphically.

On this interactive website students practice various math skills using a real life scenario at a hamburger restaurant. Those skills include adding two-digit numbers and three-digit numbers.

Canoe Puppies is a multiplayer math game that allows students from anywhere in the world to race against each other while practicing adding two-digit numbers!

Practice solving fraction addition and subtraction word problems. The fractions in these problems have unlike denominators. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or...

Learn how to solve two-digit addition problems, and then practice the skill with interactive problems.

Students learn the importance of math accuracy and, more specifically, that knowing how to add, subtract, multiply, and divide fractions make life easier for everyone. To help students come to this understanding, they are assigned to a...

The purpose of this task is to support students in developing an understanding of a place value strategy for adding numbers. By using a representation to visualize the abstract notation, students will make sense of the strategy, adding...

In this lesson, 7th graders add and subtract rational numbers on a number line.

This resource contains practice problems where students connect four numbers that create the given sum. Students are able to select the range of numbers they will be adding together.

A site by New Haven Teachers Institute, Yale University by Maxine E. Davis. This site is for secondary and middle school students. The whole curriculum is here for the viewing! Great information but no images. You can find them and add...

An interactive simulation that teaches about equivalent, evaluating, and simplifying expressions through games and exercises building coin expressions. This simulation can either be downloaded or played online and includes handouts,...

This lesson plan uses the book The Very Hungry Caterpillar to teach students to add three numbers to get a sum less than 20.

The purpose of this task is for young scholars to add, subtract, multiply, and divide decimal numbers in a real-world context. The weekly income earned by each person in the task is the median weekly income for their education level, but...

PBS offers a brief background on the Electronic Numerical Integrator and Computer (ENIAC), originally published by ScienCentral, Inc., and the American Institute of Physics.

Use this calculator to add, subtract, multiply and divide numbers in scientific notation, E notation, or engineering notation. Answers are provided in three formats: scientific notation, E notation, and engineering notation.