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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 663 · 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. 1.37 × 98 =
  2. 2.9 × 9 =
  3. 3.4 × 29 =
  4. 4.4 × 19 =
  5. 5.6 × 49 =
  6. 6.4 × 19 =
  7. 7.9 × 19 =
  8. 8.38 × 98 =
  9. 9.9 × 99 =
  10. 10.6 × 19 =
  11. 11.15 × 9 =
  12. 12.21 × 99 =
  13. 13.9 × 49 =
  14. 14.13 × 98 =
  15. 15.6 × 19 =
  16. 16.13 × 9 =
  17. 17.30 × 99 =
  18. 18.14 × 98 =
  19. 19.9 × 29 =
  20. 20.15 × 29 =
  21. 21.8 × 98 =
  22. 22.12 × 98 =
  23. 23.18 × 98 =
  24. 24.10 × 19 =
  25. 25.12 × 49 =
  26. 26.14 × 29 =
  27. 27.7 × 19 =
  28. 28.14 × 49 =
  29. 29.3 × 19 =
  30. 30.9 × 19 =
  31. 31.3 × 29 =
  32. 32.37 × 98 =
  33. 33.22 × 99 =
  34. 34.3 × 9 =
  35. 35.39 × 99 =
  36. 36.37 × 98 =
  37. 37.6 × 49 =
  38. 38.8 × 29 =
  39. 39.15 × 9 =
  40. 40.6 × 9 =

Answer key

  1. 3626
  2. 81
  3. 116
  4. 76
  5. 294
  6. 76
  7. 171
  8. 3724
  9. 891
  10. 114
  11. 135
  12. 2079
  13. 441
  14. 1274
  15. 114
  16. 117
  17. 2970
  18. 1372
  19. 261
  20. 435
  21. 784
  22. 1176
  23. 1764
  24. 190
  25. 588
  26. 406
  27. 133
  28. 686
  29. 57
  30. 171
  31. 87
  32. 3626
  33. 2178
  34. 27
  35. 3861
  36. 3626
  37. 294
  38. 232
  39. 135
  40. 54

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