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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 946 · 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. 1.15 × 19 =
  2. 2.15 × 9 =
  3. 3.40 × 98 =
  4. 4.28 × 99 =
  5. 5.13 × 9 =
  6. 6.5 × 29 =
  7. 7.9 × 49 =
  8. 8.10 × 9 =
  9. 9.12 × 9 =
  10. 10.39 × 99 =
  11. 11.17 × 99 =
  12. 12.5 × 49 =
  13. 13.12 × 49 =
  14. 14.10 × 9 =
  15. 15.10 × 29 =
  16. 16.8 × 29 =
  17. 17.32 × 99 =
  18. 18.6 × 29 =
  19. 19.7 × 9 =
  20. 20.5 × 19 =
  21. 21.12 × 19 =
  22. 22.3 × 19 =
  23. 23.15 × 29 =
  24. 24.6 × 98 =
  25. 25.4 × 49 =
  26. 26.10 × 19 =
  27. 27.7 × 49 =
  28. 28.20 × 99 =
  29. 29.3 × 9 =
  30. 30.14 × 9 =
  31. 31.8 × 49 =
  32. 32.12 × 19 =
  33. 33.32 × 99 =
  34. 34.4 × 99 =
  35. 35.11 × 49 =
  36. 36.12 × 29 =
  37. 37.3 × 29 =
  38. 38.6 × 98 =
  39. 39.26 × 98 =
  40. 40.7 × 19 =

Answer key

  1. 285
  2. 135
  3. 3920
  4. 2772
  5. 117
  6. 145
  7. 441
  8. 90
  9. 108
  10. 3861
  11. 1683
  12. 245
  13. 588
  14. 90
  15. 290
  16. 232
  17. 3168
  18. 174
  19. 63
  20. 95
  21. 228
  22. 57
  23. 435
  24. 588
  25. 196
  26. 190
  27. 343
  28. 1980
  29. 27
  30. 126
  31. 392
  32. 228
  33. 3168
  34. 396
  35. 539
  36. 348
  37. 87
  38. 588
  39. 2548
  40. 133

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