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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 226 · 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. 1.25 × 98 =
  2. 2.5 × 9 =
  3. 3.3 × 29 =
  4. 4.13 × 19 =
  5. 5.15 × 19 =
  6. 6.3 × 9 =
  7. 7.40 × 98 =
  8. 8.17 × 98 =
  9. 9.7 × 99 =
  10. 10.13 × 19 =
  11. 11.5 × 9 =
  12. 12.11 × 19 =
  13. 13.3 × 29 =
  14. 14.10 × 49 =
  15. 15.8 × 19 =
  16. 16.18 × 98 =
  17. 17.5 × 49 =
  18. 18.8 × 98 =
  19. 19.12 × 49 =
  20. 20.7 × 29 =
  21. 21.6 × 19 =
  22. 22.6 × 9 =
  23. 23.12 × 9 =
  24. 24.24 × 98 =
  25. 25.5 × 9 =
  26. 26.5 × 49 =
  27. 27.10 × 98 =
  28. 28.8 × 9 =
  29. 29.12 × 9 =
  30. 30.15 × 99 =
  31. 31.7 × 19 =
  32. 32.6 × 19 =
  33. 33.5 × 99 =
  34. 34.14 × 99 =
  35. 35.34 × 98 =
  36. 36.12 × 29 =
  37. 37.5 × 98 =
  38. 38.10 × 19 =
  39. 39.14 × 29 =
  40. 40.4 × 98 =

Answer key

  1. 2450
  2. 45
  3. 87
  4. 247
  5. 285
  6. 27
  7. 3920
  8. 1666
  9. 693
  10. 247
  11. 45
  12. 209
  13. 87
  14. 490
  15. 152
  16. 1764
  17. 245
  18. 784
  19. 588
  20. 203
  21. 114
  22. 54
  23. 108
  24. 2352
  25. 45
  26. 245
  27. 980
  28. 72
  29. 108
  30. 1485
  31. 133
  32. 114
  33. 495
  34. 1386
  35. 3332
  36. 348
  37. 490
  38. 190
  39. 406
  40. 392

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