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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 691 · 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. 1.39 × 99 =
  2. 2.8 × 29 =
  3. 3.6 × 49 =
  4. 4.16 × 98 =
  5. 5.8 × 29 =
  6. 6.3 × 99 =
  7. 7.38 × 99 =
  8. 8.37 × 99 =
  9. 9.6 × 9 =
  10. 10.5 × 9 =
  11. 11.5 × 49 =
  12. 12.3 × 9 =
  13. 13.15 × 98 =
  14. 14.9 × 49 =
  15. 15.18 × 99 =
  16. 16.10 × 9 =
  17. 17.17 × 99 =
  18. 18.11 × 19 =
  19. 19.6 × 98 =
  20. 20.11 × 99 =
  21. 21.3 × 19 =
  22. 22.15 × 19 =
  23. 23.6 × 19 =
  24. 24.3 × 29 =
  25. 25.40 × 99 =
  26. 26.11 × 29 =
  27. 27.5 × 49 =
  28. 28.14 × 19 =
  29. 29.13 × 9 =
  30. 30.6 × 9 =
  31. 31.31 × 99 =
  32. 32.27 × 98 =
  33. 33.6 × 98 =
  34. 34.3 × 19 =
  35. 35.13 × 9 =
  36. 36.26 × 98 =
  37. 37.5 × 49 =
  38. 38.15 × 9 =
  39. 39.10 × 29 =
  40. 40.4 × 19 =

Answer key

  1. 3861
  2. 232
  3. 294
  4. 1568
  5. 232
  6. 297
  7. 3762
  8. 3663
  9. 54
  10. 45
  11. 245
  12. 27
  13. 1470
  14. 441
  15. 1782
  16. 90
  17. 1683
  18. 209
  19. 588
  20. 1089
  21. 57
  22. 285
  23. 114
  24. 87
  25. 3960
  26. 319
  27. 245
  28. 266
  29. 117
  30. 54
  31. 3069
  32. 2646
  33. 588
  34. 57
  35. 117
  36. 2548
  37. 245
  38. 135
  39. 290
  40. 76

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