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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 154 · 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. 1.40 × 98 =
  2. 2.5 × 49 =
  3. 3.3 × 98 =
  4. 4.15 × 98 =
  5. 5.38 × 99 =
  6. 6.10 × 98 =
  7. 7.13 × 9 =
  8. 8.5 × 9 =
  9. 9.17 × 98 =
  10. 10.11 × 98 =
  11. 11.5 × 29 =
  12. 12.9 × 29 =
  13. 13.13 × 19 =
  14. 14.18 × 98 =
  15. 15.8 × 29 =
  16. 16.8 × 29 =
  17. 17.7 × 99 =
  18. 18.4 × 29 =
  19. 19.5 × 29 =
  20. 20.39 × 99 =
  21. 21.10 × 29 =
  22. 22.33 × 99 =
  23. 23.5 × 9 =
  24. 24.8 × 9 =
  25. 25.5 × 9 =
  26. 26.33 × 99 =
  27. 27.12 × 9 =
  28. 28.9 × 19 =
  29. 29.13 × 19 =
  30. 30.13 × 9 =
  31. 31.10 × 29 =
  32. 32.9 × 29 =
  33. 33.15 × 49 =
  34. 34.15 × 98 =
  35. 35.4 × 19 =
  36. 36.36 × 98 =
  37. 37.3 × 98 =
  38. 38.3 × 9 =
  39. 39.11 × 19 =
  40. 40.24 × 99 =

Answer key

  1. 3920
  2. 245
  3. 294
  4. 1470
  5. 3762
  6. 980
  7. 117
  8. 45
  9. 1666
  10. 1078
  11. 145
  12. 261
  13. 247
  14. 1764
  15. 232
  16. 232
  17. 693
  18. 116
  19. 145
  20. 3861
  21. 290
  22. 3267
  23. 45
  24. 72
  25. 45
  26. 3267
  27. 108
  28. 171
  29. 247
  30. 117
  31. 290
  32. 261
  33. 735
  34. 1470
  35. 76
  36. 3528
  37. 294
  38. 27
  39. 209
  40. 2376

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