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Opposite Quantities Combine to Make Zero

Opposite Quantities Combine to Make Zero . Vocabulary. Integer – A positive or negative whole number Inverse – Opposite Additive Identity - 0

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Opposite Quantities Combine to Make Zero

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  1. Opposite Quantities Combine to Make Zero

  2. Vocabulary • Integer – A positive or negative whole number • Inverse – Opposite • Additive Identity - 0 • Additive Inverse - the opposite of that number on the real number line. For example, the opposite of −3 is 3. A number and its additive inverse have a sum of 0.

  3. How would the value of -10 represent a temperature? • How would the temperature need to change in order to get back to 0 degrees? • With a partner, write a story problem using money that represents the expression 200 + (−200).

  4. Integer Card Game

  5. Closure • How do you model addition using a number line? • Using a number line, how could you find the sum of (−5) + 6? • Peter says he found the sum by thinking of it as (−5) + 5 +1. Is this an appropriate strategy? Why do you think Peter did this? • Why is the opposite of a number also called the additive inverse? What is the sum of a number and its opposite?

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