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Transcript

Extending the Number Line The opposite of a number is the same distance from 0 on a number line as the original number, but on the other side of 0. Zero is its own opposite. Integers are the set of whole numbers and their opposites Extending the Number Line Investigation 1.2 Remember: All numbers on the number line must be equally spaced apart with even intervals of numbers Order the following integers from least to greatest: Integers increase in value as you move to the right along the number line. 2, 5, 1, 1, 7 Integers decrease in value as you move to the left along the number line. Hint: Writing numbers on a number line makes it easier to tell which numbers are bigger and which are smaller Numbers on the left of 0 are smaller than the numbers to the right Remember: The symbol < means "is less than" The symbol > means "is greater than" Compare using <, >, or = A. 32 = 32 From least to greatest: 7, 2, 1, 1, 5 B. 15 < 8 C. 2 > 1 D. 0 > 7 1 Extending the Number Line Estimate the values for points AE A | | C B | | | | | 8 7 6 5 4 3 2 A: | | 1 0 1 B: E D | C: | | | | 2 3 4 5 D: | | | 6 7 8 E: Now, using the estimations for each point, state the number's opposite for each. A: B: C: D: E: For each pair of temperatures, identify which temperature is further from 2℉. Explain how you decided. D. 10℉ or +7℉ A. +6℉ or 6℉ B. +2℉ or 7℉ E. 4℉ or 0℉ C. 7℉ or +3℉ F. +7℉ or 12℉ Identify the temperature that is halfway between each pair of temperatures. Explain your reasoning. D. 8℉ and +8℉ A. 0℉ and +10℉ B. +5℉ and 15℉ E. 3℉ and 0℉ C. 5℉ and +15℉ F. +7℉ and 3℉ Rational Numbers are numbers that can be expressed as a fraction, repeating decimal, or a terminating decimal. 2 Examples: 2 = 1 3.25 = 3 1 or 13 4 4 1 = 0.333.... 3 Are integers rational numbers? Is zero a rational number? 2