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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 559 · 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. 1.3 × 49 =
  2. 2.5 × 9 =
  3. 3.36 × 98 =
  4. 4.13 × 29 =
  5. 5.12 × 9 =
  6. 6.14 × 9 =
  7. 7.37 × 99 =
  8. 8.20 × 99 =
  9. 9.6 × 9 =
  10. 10.39 × 99 =
  11. 11.16 × 99 =
  12. 12.8 × 19 =
  13. 13.8 × 9 =
  14. 14.3 × 49 =
  15. 15.6 × 9 =
  16. 16.24 × 99 =
  17. 17.12 × 49 =
  18. 18.40 × 98 =
  19. 19.7 × 98 =
  20. 20.4 × 19 =
  21. 21.13 × 99 =
  22. 22.4 × 9 =
  23. 23.14 × 9 =
  24. 24.11 × 98 =
  25. 25.37 × 98 =
  26. 26.13 × 19 =
  27. 27.18 × 99 =
  28. 28.27 × 99 =
  29. 29.12 × 29 =
  30. 30.13 × 19 =
  31. 31.12 × 9 =
  32. 32.6 × 49 =
  33. 33.3 × 9 =
  34. 34.14 × 29 =
  35. 35.3 × 49 =
  36. 36.34 × 98 =
  37. 37.26 × 98 =
  38. 38.9 × 9 =
  39. 39.25 × 98 =
  40. 40.11 × 29 =

Answer key

  1. 147
  2. 45
  3. 3528
  4. 377
  5. 108
  6. 126
  7. 3663
  8. 1980
  9. 54
  10. 3861
  11. 1584
  12. 152
  13. 72
  14. 147
  15. 54
  16. 2376
  17. 588
  18. 3920
  19. 686
  20. 76
  21. 1287
  22. 36
  23. 126
  24. 1078
  25. 3626
  26. 247
  27. 1782
  28. 2673
  29. 348
  30. 247
  31. 108
  32. 294
  33. 27
  34. 406
  35. 147
  36. 3332
  37. 2548
  38. 81
  39. 2450
  40. 319

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