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COMPARING AND ORDERING RATIONAL/INTEGER RULES REVIEW Test Answers 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. D A C B 3/10 30% ¾ 0.75 0.125 12.5% C B D 14. B 15. B 16. 0.75 17. B 18. B 19. D 20. C 21. 16 22. 10 23. C 24. G 25. C Bonus: ¼ Comparing Numbers on a Number Line Numbers get larger as you move to the right on the number line. Numbers get smaller as you move to the left on the number line. Order the following from least to greatest. ½ -3/8 -0.625 7/8 1.25 -1 1/8 Place the following on the number line below: ½ -3/8 -0.625 7/8 1.25 -1 1/8 Adding Integers Same signs … _____ Different signs… _____ Bigger team ….______ + RULES Review: Adding Integers 6 + -9 -3 + - 4 -10 + 15 -3 -7 5 Two Pencil Marks -8 – 10 -2- -6 -8 + -10 -18 -2 + + 6 4 Dry erase boards Gretchen bought a sweater for $23.89. In addition, she had to pay $1.43 in sales tax. She gave the sales clerk $30. EXPLAIN how to find the change Gretchen received from her total purchase. Do not solve. Add the cost and the tax. Subtract the answer from 30. 38.1 + x for x= - 6.12 38.1 + -6.12 Different signs subtract 38.10 +-6.12 31.98 Bigger team wins--positive So what is the rule for adding and subtracting decimals? _ 3 + _ 1 8 8 Same signs add and keep -4 = -1 8 2 _8 _ 2 17 17 Two pencil marks Same signs add and keep -8 + -2 17 17 = -10 17 -7.5 – (-3.01) = Y Two pencil mark -7.5 + 3.01 Different signs subtract Bigger team wins -7.50 +3.01 -4.49 Ana worked 6 ½ hr on Monday, 5 ¾ hr on Tuesday and 7 1/6 hr on Friday. How many total hours did she work these three days? 6 1 2 5 3 4 1 7 6 18 = 6 12 = 9 12 = 2 12 17 12 = 19 5 12