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Subtracting Integers Teacher Resources
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Eighth graders brainstorm the differences between positive and negative numbers. They create a Venn diagram comparing numbers on an elevator to numbers used in a checkbook. Students watch a video from United Streaming to compare subtracting integers to elevators. They take notes during the film.
Prealgebrarians use colored chips, stickers, and pencils to explore the world of integers. They discover absolute value, compare positive and negative integers, and apply operations to them. A detailed procedure for the three-part activity is provided, as well as pertinent worksheets with answer keys. Nice!
Review the concepts of additive inverses and adding positive and negative integers. Relate understanding to the subtraction of integers. This is done with either the use of "Algeblocks" (any square or tile manipulative should do) or a number line. The instructional activity calls for your class to sing a silly song as they walk the number line, which you could skip if your class is more mature. They also use calculators to grasp the skill. Worksheet links with practice exercises are included.
Using this worksheet, your math class will review the rules for adding and subtracting integers. They decide whether the answers to addition and subtraction problems will be positive or negative and use the number line to help them visualize the solutions. There are 12 problems on this assignment that would be appropriate as homework.
Students practice writing number sentences. After reading real world problems, they describe the same situation by writing a number sentence. Students use algebra tiles, or counters, to demonstrate the use zero pairs in solving equations. They use a building mat to model adding and subtracting integers.
Six pages prepare you to introduce your math stars to the addition and subtraction of positive and negative numbers. They drive a robot back and forth on an actual number line to represent the operations. If you don't have access to a robot, have your class imagine the scenario, or simply place a home-made representative on the appropriate place on the number line themselves. Sample problems and writing prompts are suggested to support the instructional activity.
Seventh graders explore the concept of adding and subtracting integers. In this adding and subtracting integers lesson, 7th graders use white and red beans to demonstrate adding and subtracting integers. Students play an on-line game where they must add the given numbers together to make zero.
Eighth graders review adding and subtracting of integers. The class makes a number line from -10 to 10 and practice adding and subtracting by "acting out" the math problems. Students play a card game using the number cards from a regular deck. Red are negatives, black cards are positive. Students complete an integer worksheet for homework.