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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 938 · 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. 2.8 × 29 =
  3. 3.4 × 29 =
  4. 4.10 × 19 =
  5. 5.4 × 49 =
  6. 6.9 × 49 =
  7. 7.4 × 99 =
  8. 8.13 × 19 =
  9. 9.9 × 9 =
  10. 10.12 × 9 =
  11. 11.21 × 98 =
  12. 12.8 × 49 =
  13. 13.37 × 99 =
  14. 14.9 × 9 =
  15. 15.10 × 19 =
  16. 16.3 × 9 =
  17. 17.4 × 99 =
  18. 18.36 × 98 =
  19. 19.6 × 98 =
  20. 20.13 × 29 =
  21. 21.7 × 49 =
  22. 22.10 × 29 =
  23. 23.14 × 9 =
  24. 24.32 × 98 =
  25. 25.28 × 99 =
  26. 26.3 × 29 =
  27. 27.7 × 9 =
  28. 28.8 × 29 =
  29. 29.5 × 9 =
  30. 30.15 × 99 =
  31. 31.15 × 29 =
  32. 32.31 × 99 =
  33. 33.5 × 19 =
  34. 34.4 × 49 =
  35. 35.3 × 9 =
  36. 36.9 × 9 =
  37. 37.6 × 19 =
  38. 38.39 × 98 =
  39. 39.10 × 19 =
  40. 40.9 × 49 =

Answer key

  1. 72
  2. 232
  3. 116
  4. 190
  5. 196
  6. 441
  7. 396
  8. 247
  9. 81
  10. 108
  11. 2058
  12. 392
  13. 3663
  14. 81
  15. 190
  16. 27
  17. 396
  18. 3528
  19. 588
  20. 377
  21. 343
  22. 290
  23. 126
  24. 3136
  25. 2772
  26. 87
  27. 63
  28. 232
  29. 45
  30. 1485
  31. 435
  32. 3069
  33. 95
  34. 196
  35. 27
  36. 81
  37. 114
  38. 3822
  39. 190
  40. 441

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