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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 971 · 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 × 29 =
  2. 2.12 × 49 =
  3. 3.10 × 19 =
  4. 4.37 × 98 =
  5. 5.7 × 19 =
  6. 6.38 × 99 =
  7. 7.5 × 29 =
  8. 8.4 × 19 =
  9. 9.8 × 98 =
  10. 10.5 × 9 =
  11. 11.9 × 19 =
  12. 12.13 × 49 =
  13. 13.11 × 98 =
  14. 14.3 × 19 =
  15. 15.33 × 99 =
  16. 16.25 × 98 =
  17. 17.3 × 49 =
  18. 18.7 × 98 =
  19. 19.5 × 49 =
  20. 20.3 × 9 =
  21. 21.6 × 19 =
  22. 22.4 × 29 =
  23. 23.3 × 9 =
  24. 24.14 × 49 =
  25. 25.5 × 29 =
  26. 26.14 × 49 =
  27. 27.33 × 99 =
  28. 28.34 × 99 =
  29. 29.7 × 49 =
  30. 30.9 × 9 =
  31. 31.5 × 99 =
  32. 32.23 × 99 =
  33. 33.12 × 29 =
  34. 34.13 × 49 =
  35. 35.13 × 9 =
  36. 36.15 × 9 =
  37. 37.20 × 98 =
  38. 38.5 × 19 =
  39. 39.6 × 98 =
  40. 40.5 × 19 =

Answer key

  1. 290
  2. 588
  3. 190
  4. 3626
  5. 133
  6. 3762
  7. 145
  8. 76
  9. 784
  10. 45
  11. 171
  12. 637
  13. 1078
  14. 57
  15. 3267
  16. 2450
  17. 147
  18. 686
  19. 245
  20. 27
  21. 114
  22. 116
  23. 27
  24. 686
  25. 145
  26. 686
  27. 3267
  28. 3366
  29. 343
  30. 81
  31. 495
  32. 2277
  33. 348
  34. 637
  35. 117
  36. 135
  37. 1960
  38. 95
  39. 588
  40. 95

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