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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 502 · 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. 1.3 × 9 =
  2. 2.10 × 9 =
  3. 3.14 × 19 =
  4. 4.14 × 9 =
  5. 5.15 × 98 =
  6. 6.12 × 29 =
  7. 7.35 × 99 =
  8. 8.11 × 98 =
  9. 9.25 × 99 =
  10. 10.6 × 9 =
  11. 11.12 × 98 =
  12. 12.29 × 98 =
  13. 13.9 × 19 =
  14. 14.9 × 9 =
  15. 15.9 × 49 =
  16. 16.10 × 19 =
  17. 17.39 × 98 =
  18. 18.32 × 98 =
  19. 19.11 × 19 =
  20. 20.37 × 98 =
  21. 21.7 × 19 =
  22. 22.3 × 9 =
  23. 23.18 × 98 =
  24. 24.5 × 29 =
  25. 25.10 × 29 =
  26. 26.11 × 29 =
  27. 27.9 × 9 =
  28. 28.4 × 19 =
  29. 29.27 × 98 =
  30. 30.13 × 9 =
  31. 31.40 × 99 =
  32. 32.11 × 49 =
  33. 33.12 × 99 =
  34. 34.7 × 9 =
  35. 35.12 × 49 =
  36. 36.7 × 19 =
  37. 37.7 × 29 =
  38. 38.12 × 29 =
  39. 39.3 × 29 =
  40. 40.14 × 19 =

Answer key

  1. 27
  2. 90
  3. 266
  4. 126
  5. 1470
  6. 348
  7. 3465
  8. 1078
  9. 2475
  10. 54
  11. 1176
  12. 2842
  13. 171
  14. 81
  15. 441
  16. 190
  17. 3822
  18. 3136
  19. 209
  20. 3626
  21. 133
  22. 27
  23. 1764
  24. 145
  25. 290
  26. 319
  27. 81
  28. 76
  29. 2646
  30. 117
  31. 3960
  32. 539
  33. 1188
  34. 63
  35. 588
  36. 133
  37. 203
  38. 348
  39. 87
  40. 266

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