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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 785 · 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. 1.35 × 99 =
  2. 2.7 × 19 =
  3. 3.5 × 9 =
  4. 4.5 × 99 =
  5. 5.6 × 9 =
  6. 6.38 × 98 =
  7. 7.10 × 9 =
  8. 8.3 × 9 =
  9. 9.9 × 49 =
  10. 10.5 × 9 =
  11. 11.5 × 19 =
  12. 12.11 × 29 =
  13. 13.6 × 29 =
  14. 14.7 × 49 =
  15. 15.32 × 98 =
  16. 16.12 × 29 =
  17. 17.12 × 99 =
  18. 18.3 × 29 =
  19. 19.8 × 19 =
  20. 20.4 × 19 =
  21. 21.14 × 19 =
  22. 22.5 × 49 =
  23. 23.3 × 9 =
  24. 24.6 × 9 =
  25. 25.7 × 19 =
  26. 26.11 × 9 =
  27. 27.9 × 9 =
  28. 28.15 × 19 =
  29. 29.5 × 49 =
  30. 30.39 × 99 =
  31. 31.7 × 49 =
  32. 32.10 × 9 =
  33. 33.34 × 99 =
  34. 34.4 × 99 =
  35. 35.6 × 19 =
  36. 36.38 × 99 =
  37. 37.12 × 29 =
  38. 38.28 × 99 =
  39. 39.9 × 99 =
  40. 40.4 × 19 =

Answer key

  1. 3465
  2. 133
  3. 45
  4. 495
  5. 54
  6. 3724
  7. 90
  8. 27
  9. 441
  10. 45
  11. 95
  12. 319
  13. 174
  14. 343
  15. 3136
  16. 348
  17. 1188
  18. 87
  19. 152
  20. 76
  21. 266
  22. 245
  23. 27
  24. 54
  25. 133
  26. 99
  27. 81
  28. 285
  29. 245
  30. 3861
  31. 343
  32. 90
  33. 3366
  34. 396
  35. 114
  36. 3762
  37. 348
  38. 2772
  39. 891
  40. 76

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