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Name Chapter 25, Lesson 1 Reteach Date Hands On: Positive and Negative Numbers CA Standard NS 1.5 You will ﬁnd opposite of a number and its absolute value. Write the opposite and the absolute value of each integer. 3 2 + - 2 units 3 units -5 -4 -3 -2 -1 0 1 2 3 4 5 + 3 is 3 units from 0, so the absolute value of +3 is 3. The opposite of +3 is -3. -5 -4 -3 -2 -1 0 1 2 3 4 5 The opposite of -2 is +2. The absolute value of -2 is 2. Write the opposite of each number. 1. + 2. - 3. - 4. - 5. - 6. + 7. - 8. - 7 7 5 17 3 19 4 12 Write the absolute value for each number. 9. + 10. - 11. - 12. + 13. - 14. + 15. - 16. + 21 38 32 70 44 52 28 48 Writing Math Opposite numbers, like +7 and -7, have the same absolute value. Explain why this is true. Reteach Use with text pages 542–543. Copyright © Houghton Mifflin Company. All rights reserved. 73745_C25L1_RET.indd 19 6/13/07 10:19:13 PM