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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 959 · 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. 1.29 × 98 =
  2. 2.15 × 9 =
  3. 3.3 × 9 =
  4. 4.11 × 9 =
  5. 5.39 × 99 =
  6. 6.30 × 98 =
  7. 7.8 × 19 =
  8. 8.11 × 29 =
  9. 9.4 × 19 =
  10. 10.14 × 9 =
  11. 11.10 × 19 =
  12. 12.38 × 98 =
  13. 13.6 × 49 =
  14. 14.15 × 19 =
  15. 15.18 × 99 =
  16. 16.33 × 99 =
  17. 17.5 × 99 =
  18. 18.21 × 98 =
  19. 19.4 × 99 =
  20. 20.5 × 29 =
  21. 21.7 × 19 =
  22. 22.14 × 49 =
  23. 23.14 × 49 =
  24. 24.14 × 9 =
  25. 25.6 × 29 =
  26. 26.5 × 29 =
  27. 27.9 × 49 =
  28. 28.20 × 98 =
  29. 29.7 × 9 =
  30. 30.15 × 29 =
  31. 31.8 × 49 =
  32. 32.8 × 19 =
  33. 33.5 × 9 =
  34. 34.15 × 19 =
  35. 35.27 × 98 =
  36. 36.6 × 19 =
  37. 37.15 × 9 =
  38. 38.33 × 98 =
  39. 39.10 × 29 =
  40. 40.8 × 49 =

Answer key

  1. 2842
  2. 135
  3. 27
  4. 99
  5. 3861
  6. 2940
  7. 152
  8. 319
  9. 76
  10. 126
  11. 190
  12. 3724
  13. 294
  14. 285
  15. 1782
  16. 3267
  17. 495
  18. 2058
  19. 396
  20. 145
  21. 133
  22. 686
  23. 686
  24. 126
  25. 174
  26. 145
  27. 441
  28. 1960
  29. 63
  30. 435
  31. 392
  32. 152
  33. 45
  34. 285
  35. 2646
  36. 114
  37. 135
  38. 3234
  39. 290
  40. 392

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