Fifth graders discover how to use inverse operations to solve equations. In this inverse operations lesson, 5th graders explore visual examples. Students also practice solving problems that their instructors model.

Second graders practice the multiples of three as an introduction to multiplying by three.

An extensive collection of teacher resources to help in teaching and reviewing the concepts of basic addition and subtraction. There are many worksheets, activities, PowerPoint presentations, smartboard activities, Word, Excel, and pdf...

Here's an extensive selection of teacher resources to aide in teaching and reviewing addition and subtraction. You will find resources on the vocabulary used in word problems, column addition, checking addition and subtraction, games,...

On this interactive site students practice addition and subtraction skills. At the end of the lesson students will be able to solve addition problems using a formal written algorithm and use various strategies to solve unfamiliar problems.

Teaches addition and subtraction facts up to twenty using animated penguins. The penguins jump between two icebergs to show addition facts for the given total. For subtraction facts the penguins dive off the iceberg into the water below....

Addition and Subtraction Math Theme provides an excellent collection of free sample worksheets, teacher resources, lesson plans and interactive media to support addition and subtraction skills.

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

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

Practice your basic addition, subtraction, multiplication and division facts using these interactive flashcards. Each section gives you 20 flashcards. After each correct answer the card turns green. If you get an incorrect answer the...

This site introduces addition and subtraction fact families and provides an opportunity for students to practice the skill.

Explains what fact families are for addition and subtraction and includes sample problems to try.

Help Math Maven solve this mystery! Items are missing from several hotel rooms, but some addition and subtraction clues have been left behind. Use your skills to figure out where the thief will strike next!

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

Addition and Subtraction Math Theme provides an excellent collection of free sample worksheets, teacher resources, lesson plans and interactive media to support addition and subtraction skills.

This sample chapter from Hurst's book Picturing Math is an excellent resource for using picture books and activities for learning computation.

Create your own addition/subtraction math facts worksheets. Use them in the classroom for practice or timed drills, or at home! Choose from two levels of difficulty, and vertical or horizontal equation format. You input minimum and...

This task challenges a student to demonstrate understanding of concepts involved in addition and subtraction. A student must be fluent with addition and subtraction within 100 and understand the relationship between addition and...

Students can test their knowledge of addition and subtraction facts. They can choose to have their quiz graded or select new problems.

Smart Exchange is an online community that teachers can share resources. This SMART Notebook file is a great introduction to what fact families are and how 3 numbers can be related to one another. This fact house offers activities to...

This website explains and defines basic subtraction. There are practice problems at the very end of this lesson.

Explore the relationship between addition and subtraction with this lesson. Help students understand that "every subtraction fact has a related addition number sentence, and every addition fact has a related subtraction number...

This task challenges a student to demonstrate understanding of concepts involved in addition and subtraction.

Want to practice addition and subtraction skills in a new and exciting way? Use this online math lesson card game activity.