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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 173 · 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. 1.14 × 98 =
  2. 2.4 × 19 =
  3. 3.8 × 99 =
  4. 4.19 × 99 =
  5. 5.15 × 9 =
  6. 6.3 × 29 =
  7. 7.4 × 29 =
  8. 8.32 × 99 =
  9. 9.12 × 49 =
  10. 10.28 × 98 =
  11. 11.4 × 9 =
  12. 12.34 × 99 =
  13. 13.31 × 99 =
  14. 14.6 × 29 =
  15. 15.4 × 29 =
  16. 16.13 × 9 =
  17. 17.4 × 19 =
  18. 18.5 × 99 =
  19. 19.3 × 98 =
  20. 20.39 × 99 =
  21. 21.11 × 19 =
  22. 22.15 × 98 =
  23. 23.3 × 19 =
  24. 24.3 × 9 =
  25. 25.8 × 49 =
  26. 26.3 × 99 =
  27. 27.10 × 99 =
  28. 28.12 × 29 =
  29. 29.15 × 19 =
  30. 30.7 × 19 =
  31. 31.13 × 9 =
  32. 32.18 × 99 =
  33. 33.4 × 19 =
  34. 34.40 × 98 =
  35. 35.13 × 9 =
  36. 36.10 × 29 =
  37. 37.14 × 19 =
  38. 38.39 × 99 =
  39. 39.5 × 19 =
  40. 40.6 × 29 =

Answer key

  1. 1372
  2. 76
  3. 792
  4. 1881
  5. 135
  6. 87
  7. 116
  8. 3168
  9. 588
  10. 2744
  11. 36
  12. 3366
  13. 3069
  14. 174
  15. 116
  16. 117
  17. 76
  18. 495
  19. 294
  20. 3861
  21. 209
  22. 1470
  23. 57
  24. 27
  25. 392
  26. 297
  27. 990
  28. 348
  29. 285
  30. 133
  31. 117
  32. 1782
  33. 76
  34. 3920
  35. 117
  36. 290
  37. 266
  38. 3861
  39. 95
  40. 174

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