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Multiply and Divide Rational Numbers (Answer Key) Multiply. Write in simplest form. ! ! 1. 5. 3 ! ! ! 6. −12 2. !" 11. Problem cut off ! 3. − !" ! 4. !" Write the multiplicative inverse of each number. 1. 7/5 2. -‐1/12 3. -‐4/11 8. Answer 1/10 Multiplicative Inverse 10 9. Answer -‐3/10 Multiplicative Inverse -‐10/3 10. Answer 249/9 or 27 2/9 Multiplicative Inverse 9/245 11. Answer -‐21/41 Multiplicative Inverse -‐41/21 12. Answer The Eurasian Eagle Owl is 104 times as heavy as the Elf Owl. Multiply. Write in simplest form. ! 12. !" ! 13. !" ! 14. ! ! 15. ! ! 16. − ! ! 17. − !" ! 18. ! ! 19. !" ! 20. ! 21. 3 1/3 22. 14 1/6 23. 1 1/2 28. 4.5 cups 29. 337,500 people Algebra. Evaluate each expression. 30. 1/10 31. 2/9 32. -‐32/135 33. -‐4/27 Write the multiplicative inverse of each number. 13. -‐9/7 14. -‐8/5 15. 1/15 16. 1/18 17. 5/17 18. 8/33 Divide. Write in simplest form. 19. 8/15 20. 9/16 21. 4/5 22. 4 23. -‐1 1/15 24. -‐9/20 25. 5/6 26. 7/20 27. 1/10 28. 3/16 29. 2/15 30. 3/14 31. 3/2 32. 3 4/7 33. -‐2 5/8 34. -‐51 36. 4 hours and 1/6 of another hour 39. 4 batches and 7/8 cups of cocoa remaining