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Name _______________________________________ Date __________________ Class __________________ LESSON 1-2 Practice A Properties of Real Numbers Find the additive inverse of each number. 1. 5 5 ________ 0 2. 6.1 3. 1 2 1 ________ 0 2 6.1 ________ 0 Find the multiplicative inverse of each number. 4. 11 11 ________ 1 5. 3.5 6. 3.5 ________ 1 2 3 2 3 ________ 1 Complete each number sentence. Make each statement true. 7. 5(7 2) 5(7) 5(________) 8. (4 6) 3 ________ (6 3) Identify the property demonstrated by each equation. 9. 7x x 7 10. c(3 5) 3c 5c ________________________________________ 11. (4 y) 1 4 (y 1) ________________________________________ 12. 0 y (y) ________________________________________ ________________________________________ Use the table for Exercises 11–14. Use properties and mental math to help you find each cost. The Outfit Outlet 13. cost of a T-shirt and a hat __________________ Jeans $23.50 14. cost of 2 T-shirts and a pair of jeans __________________ T-shirt $9.95 15. cost of a pair of jeans at a 20% discount __________________ Hat $6.75 16. total cost of one of each item __________________ Determine if each statement is sometimes, always, or never true. Give an example or property to support your answer. 17. a b c 3c ___________________________________ 18. 4x 6 6x 4 ___________________________________ 19. z (z) 5 ___________________________________ Original content Copyright © by Holt McDougal. Additions and changes to the original content are the responsibility of the instructor. 1-11 Holt Algebra 2 Original content Copyright © by Holt McDougal. Additions and changes to the original content are the responsibility of the instructor. A2 Holt Algebra 2