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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 322 · 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. 1.6 × 49 =
  2. 2.18 × 98 =
  3. 3.15 × 19 =
  4. 4.9 × 9 =
  5. 5.5 × 29 =
  6. 6.9 × 99 =
  7. 7.3 × 99 =
  8. 8.14 × 49 =
  9. 9.9 × 19 =
  10. 10.39 × 99 =
  11. 11.4 × 9 =
  12. 12.38 × 98 =
  13. 13.9 × 29 =
  14. 14.3 × 29 =
  15. 15.13 × 29 =
  16. 16.3 × 9 =
  17. 17.4 × 49 =
  18. 18.7 × 49 =
  19. 19.9 × 19 =
  20. 20.4 × 99 =
  21. 21.13 × 29 =
  22. 22.3 × 29 =
  23. 23.9 × 19 =
  24. 24.11 × 29 =
  25. 25.3 × 99 =
  26. 26.14 × 29 =
  27. 27.26 × 98 =
  28. 28.3 × 99 =
  29. 29.3 × 9 =
  30. 30.6 × 49 =
  31. 31.5 × 29 =
  32. 32.3 × 19 =
  33. 33.11 × 9 =
  34. 34.6 × 49 =
  35. 35.9 × 19 =
  36. 36.3 × 49 =
  37. 37.37 × 98 =
  38. 38.4 × 19 =
  39. 39.14 × 9 =
  40. 40.4 × 19 =

Answer key

  1. 294
  2. 1764
  3. 285
  4. 81
  5. 145
  6. 891
  7. 297
  8. 686
  9. 171
  10. 3861
  11. 36
  12. 3724
  13. 261
  14. 87
  15. 377
  16. 27
  17. 196
  18. 343
  19. 171
  20. 396
  21. 377
  22. 87
  23. 171
  24. 319
  25. 297
  26. 406
  27. 2548
  28. 297
  29. 27
  30. 294
  31. 145
  32. 57
  33. 99
  34. 294
  35. 171
  36. 147
  37. 3626
  38. 76
  39. 126
  40. 76

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