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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 193 · 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. 1.5 × 98 =
  2. 2.15 × 9 =
  3. 3.39 × 99 =
  4. 4.3 × 19 =
  5. 5.3 × 9 =
  6. 6.13 × 9 =
  7. 7.14 × 49 =
  8. 8.7 × 49 =
  9. 9.3 × 49 =
  10. 10.14 × 49 =
  11. 11.13 × 49 =
  12. 12.3 × 9 =
  13. 13.5 × 98 =
  14. 14.11 × 9 =
  15. 15.25 × 98 =
  16. 16.29 × 98 =
  17. 17.3 × 49 =
  18. 18.13 × 98 =
  19. 19.12 × 9 =
  20. 20.3 × 49 =
  21. 21.9 × 99 =
  22. 22.5 × 29 =
  23. 23.5 × 19 =
  24. 24.34 × 98 =
  25. 25.27 × 99 =
  26. 26.36 × 98 =
  27. 27.5 × 19 =
  28. 28.39 × 98 =
  29. 29.34 × 98 =
  30. 30.10 × 9 =
  31. 31.4 × 98 =
  32. 32.3 × 49 =
  33. 33.12 × 49 =
  34. 34.14 × 29 =
  35. 35.6 × 49 =
  36. 36.5 × 99 =
  37. 37.15 × 29 =
  38. 38.13 × 29 =
  39. 39.4 × 19 =
  40. 40.3 × 49 =

Answer key

  1. 490
  2. 135
  3. 3861
  4. 57
  5. 27
  6. 117
  7. 686
  8. 343
  9. 147
  10. 686
  11. 637
  12. 27
  13. 490
  14. 99
  15. 2450
  16. 2842
  17. 147
  18. 1274
  19. 108
  20. 147
  21. 891
  22. 145
  23. 95
  24. 3332
  25. 2673
  26. 3528
  27. 95
  28. 3822
  29. 3332
  30. 90
  31. 392
  32. 147
  33. 588
  34. 406
  35. 294
  36. 495
  37. 435
  38. 377
  39. 76
  40. 147

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