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Subtracting Integers

14 minutes 31 seconds

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Woman stands next to an overhead projector. Caption. Yeah, okay, let's do that. Let's make these a zero.

Provides classroom activities for middle school math teachers to help students gain a better understanding of subtraction of integers, a skill necessary for success in algebra. Uses manipulatives and a mat board to compute several subtraction problems that require the addition of zero pairs to solve. Shows seventh grade math teacher teaching this lesson using red and blue chips and "convenient zeroes".

Media Details

Runtime: 14 minutes 31 seconds

Topic: Education, Mathematics
Subtopic: Mathematics, Teacher Training
Grade/Interest Level: PT/TT
Release Year: 2001
Producer/Distributor: Center For Distance & Online Learning L.A. Co. Office Of Ed
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Woman, standing and speaking to a classroom of children. Caption. It's also a key point when we're doing problem solving.

Woman speaks towards camera. Caption. Making the students decide, then explain their thinking.

Woman stands in front of a bulletin board, speaking to an audience off camera. Caption. I want to make sure you get that concept of equal.

Woman stands behind and instructs 2 teenage boys. Caption. The concept of functions by exploring patterns.

4 number matrices; first 3 have numbers, the 4th is blank. Caption. To find a pattern in the first 3 Xs.

People in intersecting line formation on grass. Caption. Students move outside and then create a human graph.

Still image from: 10 Fat Turkeys

Person in a science lab. One beaker contains an orange liquid, and one beaker contains a green liquid. Caption: It's orange. That means its pH is 5.

Black and white image with words, "The sum of two opposite integers equals zero".

Black and white still frame of man in glasses looking down at phone with lips parted in mid-speech. Caption. From there, you'll know whether he has enough money.