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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 975 · 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. 1.8 × 9 =
  2. 2.13 × 49 =
  3. 3.5 × 49 =
  4. 4.11 × 49 =
  5. 5.24 × 98 =
  6. 6.3 × 29 =
  7. 7.15 × 19 =
  8. 8.12 × 19 =
  9. 9.7 × 19 =
  10. 10.28 × 98 =
  11. 11.26 × 98 =
  12. 12.4 × 99 =
  13. 13.36 × 98 =
  14. 14.5 × 99 =
  15. 15.12 × 9 =
  16. 16.6 × 9 =
  17. 17.4 × 19 =
  18. 18.4 × 19 =
  19. 19.14 × 99 =
  20. 20.9 × 49 =
  21. 21.39 × 99 =
  22. 22.4 × 9 =
  23. 23.6 × 29 =
  24. 24.28 × 99 =
  25. 25.14 × 19 =
  26. 26.8 × 49 =
  27. 27.32 × 98 =
  28. 28.10 × 19 =
  29. 29.12 × 29 =
  30. 30.15 × 9 =
  31. 31.13 × 99 =
  32. 32.5 × 98 =
  33. 33.15 × 29 =
  34. 34.3 × 19 =
  35. 35.6 × 29 =
  36. 36.6 × 98 =
  37. 37.6 × 29 =
  38. 38.5 × 49 =
  39. 39.21 × 98 =
  40. 40.7 × 19 =

Answer key

  1. 72
  2. 637
  3. 245
  4. 539
  5. 2352
  6. 87
  7. 285
  8. 228
  9. 133
  10. 2744
  11. 2548
  12. 396
  13. 3528
  14. 495
  15. 108
  16. 54
  17. 76
  18. 76
  19. 1386
  20. 441
  21. 3861
  22. 36
  23. 174
  24. 2772
  25. 266
  26. 392
  27. 3136
  28. 190
  29. 348
  30. 135
  31. 1287
  32. 490
  33. 435
  34. 57
  35. 174
  36. 588
  37. 174
  38. 245
  39. 2058
  40. 133

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