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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 875 · 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 × 49 =
  2. 2.15 × 19 =
  3. 3.19 × 98 =
  4. 4.36 × 98 =
  5. 5.37 × 98 =
  6. 6.4 × 9 =
  7. 7.20 × 99 =
  8. 8.37 × 98 =
  9. 9.5 × 29 =
  10. 10.5 × 29 =
  11. 11.10 × 19 =
  12. 12.5 × 49 =
  13. 13.4 × 19 =
  14. 14.14 × 29 =
  15. 15.7 × 29 =
  16. 16.12 × 49 =
  17. 17.14 × 9 =
  18. 18.3 × 9 =
  19. 19.7 × 19 =
  20. 20.7 × 29 =
  21. 21.11 × 49 =
  22. 22.19 × 98 =
  23. 23.14 × 49 =
  24. 24.25 × 98 =
  25. 25.10 × 9 =
  26. 26.5 × 49 =
  27. 27.14 × 29 =
  28. 28.9 × 49 =
  29. 29.14 × 49 =
  30. 30.15 × 49 =
  31. 31.13 × 9 =
  32. 32.7 × 19 =
  33. 33.14 × 49 =
  34. 34.11 × 9 =
  35. 35.37 × 99 =
  36. 36.35 × 99 =
  37. 37.31 × 99 =
  38. 38.7 × 49 =
  39. 39.3 × 9 =
  40. 40.13 × 49 =

Answer key

  1. 392
  2. 285
  3. 1862
  4. 3528
  5. 3626
  6. 36
  7. 1980
  8. 3626
  9. 145
  10. 145
  11. 190
  12. 245
  13. 76
  14. 406
  15. 203
  16. 588
  17. 126
  18. 27
  19. 133
  20. 203
  21. 539
  22. 1862
  23. 686
  24. 2450
  25. 90
  26. 245
  27. 406
  28. 441
  29. 686
  30. 735
  31. 117
  32. 133
  33. 686
  34. 99
  35. 3663
  36. 3465
  37. 3069
  38. 343
  39. 27
  40. 637

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