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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 192 · 40 questions
TalentJR

How it works (Round and adjust): Round up: 49 is 50 − 1, 98 is 100 − 2. Multiply by the round number. Take away the number times the bit you added.

NameDateTime takenScore ___ / 40
  1. 1.10 × 9 =
  2. 2.6 × 9 =
  3. 3.13 × 49 =
  4. 4.5 × 9 =
  5. 5.7 × 19 =
  6. 6.5 × 49 =
  7. 7.7 × 19 =
  8. 8.8 × 49 =
  9. 9.35 × 99 =
  10. 10.3 × 9 =
  11. 11.27 × 98 =
  12. 12.27 × 98 =
  13. 13.14 × 49 =
  14. 14.3 × 29 =
  15. 15.4 × 29 =
  16. 16.35 × 98 =
  17. 17.11 × 29 =
  18. 18.5 × 29 =
  19. 19.11 × 29 =
  20. 20.11 × 9 =
  21. 21.5 × 9 =
  22. 22.7 × 9 =
  23. 23.29 × 98 =
  24. 24.32 × 99 =
  25. 25.10 × 19 =
  26. 26.21 × 98 =
  27. 27.4 × 9 =
  28. 28.39 × 98 =
  29. 29.14 × 9 =
  30. 30.8 × 49 =
  31. 31.20 × 99 =
  32. 32.3 × 29 =
  33. 33.7 × 98 =
  34. 34.30 × 98 =
  35. 35.10 × 9 =
  36. 36.15 × 19 =
  37. 37.6 × 29 =
  38. 38.39 × 99 =
  39. 39.4 × 9 =
  40. 40.9 × 9 =

Answer key

  1. 90
  2. 54
  3. 637
  4. 45
  5. 133
  6. 245
  7. 133
  8. 392
  9. 3465
  10. 27
  11. 2646
  12. 2646
  13. 686
  14. 87
  15. 116
  16. 3430
  17. 319
  18. 145
  19. 319
  20. 99
  21. 45
  22. 63
  23. 2842
  24. 3168
  25. 190
  26. 2058
  27. 36
  28. 3822
  29. 126
  30. 392
  31. 1980
  32. 87
  33. 686
  34. 2940
  35. 90
  36. 285
  37. 174
  38. 3861
  39. 36
  40. 81

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