In this lesson plan, 1st graders are to use a table of sums to explore the relationship between adding and subtracting.

For this lesson plan students use strategies based on place value to add and subtract within 100.

In this lesson plan, 7th graders add and subtract rational numbers to solve word problems.

This lesson plans explores adding and subtracting word problems. This is a complete lesson including attached items.

In this lesson plan, 1st graders play a matching game to explore unknown numbers.

[Free Registration/Login may be required to access all resource tools.] The video in the resource shows how to find a missing operation in a multi-step problem by working backwards. The practice problems involve finding either a missing...

[Free Registration/Login Required] Students are given real world word problems to explore adding and subtracting rational numbers. Click challenge me to answer a practice question and click learn more to watch a video.

This interactive activity allows you to change an equation's numbers in an attempt to figure out what operations are being used to control the answers.

In this activity, students learn to count and solve original word problems. They learn to add by combining sets and subtract when removing the set. They use manipulatives to reflect the reasoning used in problem solving.

In this lesson plan, 1st graders determine if lengths are equal to one another.

[Free Registration/Login may be required to access all resource tools.] Practice adding and subtracting fractions in these problems that include inequalities.

Practice adding and subtracting negative fractions, decimals, and percents. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.

The teacher reads "The Napping House" to the class, stopping each time a person or animal gets into the bed so the young scholars can add a counter to the ten-frame. Ten-Frame printable is included.

Students are asked to solve a word problem with both addends unknown. They will write an equation and draw a picture to use to explain their answer.

The purpose of this task is to help students develop flexible strategies for adding and subtracting within 20. Students will pick 5 number cards from pre-made cards labeled 1-10. Then, another student will pick a "target number" between...

Practice adding and subtracting polynomials. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video, or receive hints.

Practice adding and subtracting mixed numbers.

[Free Registration/Login may be required to access all resource tools.] The video [0:34] describes how to add and subtract measurements of length from a given word problem. The video is followed by practice problems covering the topics...

Multiplayer math game where puppy teams on skateboards race by solving two-step math problems.

[Free Registration/Login may be required to access all resource tools.] The video describes how to add and subtract measurements of length from a given word problem. The video is followed by practice problems covering the topics in the...

[Free Registration/Login may be required to access all resource tools.] The video describes how to add and subtract measurements of length from a given word problem. The video is followed by practice problems covering the topics in the...

Practice adding by 'putting together' (with numbers less than 10).

Students will identify the attributes of shapes and use those attributes to draw and describe shapes. This lesson contains a detailed plan, pictures of student work, and videos of the lesson in action.

Fourth graders love to shop! In this exciting instructional activity, 4th graders will discover how to count money using some real world activities. This instructional activity includes a detailed lesson plan, printable worksheets, and a...