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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 792 · 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. 1.7 × 9 =
  2. 2.3 × 49 =
  3. 3.39 × 99 =
  4. 4.9 × 29 =
  5. 5.12 × 49 =
  6. 6.4 × 9 =
  7. 7.7 × 19 =
  8. 8.4 × 19 =
  9. 9.3 × 19 =
  10. 10.35 × 99 =
  11. 11.38 × 99 =
  12. 12.11 × 49 =
  13. 13.10 × 9 =
  14. 14.32 × 98 =
  15. 15.40 × 99 =
  16. 16.14 × 98 =
  17. 17.6 × 9 =
  18. 18.38 × 99 =
  19. 19.9 × 29 =
  20. 20.8 × 19 =
  21. 21.9 × 49 =
  22. 22.18 × 98 =
  23. 23.5 × 29 =
  24. 24.22 × 99 =
  25. 25.6 × 9 =
  26. 26.27 × 98 =
  27. 27.15 × 29 =
  28. 28.11 × 29 =
  29. 29.9 × 9 =
  30. 30.14 × 9 =
  31. 31.3 × 29 =
  32. 32.3 × 29 =
  33. 33.12 × 9 =
  34. 34.4 × 19 =
  35. 35.15 × 19 =
  36. 36.33 × 99 =
  37. 37.12 × 49 =
  38. 38.10 × 49 =
  39. 39.6 × 19 =
  40. 40.6 × 9 =

Answer key

  1. 63
  2. 147
  3. 3861
  4. 261
  5. 588
  6. 36
  7. 133
  8. 76
  9. 57
  10. 3465
  11. 3762
  12. 539
  13. 90
  14. 3136
  15. 3960
  16. 1372
  17. 54
  18. 3762
  19. 261
  20. 152
  21. 441
  22. 1764
  23. 145
  24. 2178
  25. 54
  26. 2646
  27. 435
  28. 319
  29. 81
  30. 126
  31. 87
  32. 87
  33. 108
  34. 76
  35. 285
  36. 3267
  37. 588
  38. 490
  39. 114
  40. 54

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