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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 201 · 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. 1.24 × 98 =
  2. 2.13 × 19 =
  3. 3.12 × 99 =
  4. 4.3 × 29 =
  5. 5.8 × 29 =
  6. 6.8 × 29 =
  7. 7.6 × 19 =
  8. 8.11 × 49 =
  9. 9.3 × 29 =
  10. 10.8 × 99 =
  11. 11.35 × 98 =
  12. 12.5 × 9 =
  13. 13.3 × 29 =
  14. 14.31 × 98 =
  15. 15.7 × 19 =
  16. 16.5 × 29 =
  17. 17.18 × 98 =
  18. 18.4 × 9 =
  19. 19.3 × 19 =
  20. 20.4 × 29 =
  21. 21.3 × 19 =
  22. 22.15 × 19 =
  23. 23.15 × 29 =
  24. 24.12 × 49 =
  25. 25.3 × 9 =
  26. 26.6 × 19 =
  27. 27.10 × 49 =
  28. 28.6 × 9 =
  29. 29.8 × 19 =
  30. 30.12 × 49 =
  31. 31.15 × 98 =
  32. 32.15 × 49 =
  33. 33.8 × 19 =
  34. 34.8 × 29 =
  35. 35.4 × 99 =
  36. 36.26 × 99 =
  37. 37.5 × 49 =
  38. 38.10 × 49 =
  39. 39.7 × 9 =
  40. 40.3 × 9 =

Answer key

  1. 2352
  2. 247
  3. 1188
  4. 87
  5. 232
  6. 232
  7. 114
  8. 539
  9. 87
  10. 792
  11. 3430
  12. 45
  13. 87
  14. 3038
  15. 133
  16. 145
  17. 1764
  18. 36
  19. 57
  20. 116
  21. 57
  22. 285
  23. 435
  24. 588
  25. 27
  26. 114
  27. 490
  28. 54
  29. 152
  30. 588
  31. 1470
  32. 735
  33. 152
  34. 232
  35. 396
  36. 2574
  37. 245
  38. 490
  39. 63
  40. 27

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