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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 894 · 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 × 49 =
  2. 2.11 × 9 =
  3. 3.5 × 29 =
  4. 4.9 × 9 =
  5. 5.10 × 19 =
  6. 6.6 × 29 =
  7. 7.7 × 29 =
  8. 8.12 × 49 =
  9. 9.26 × 99 =
  10. 10.8 × 19 =
  11. 11.3 × 19 =
  12. 12.15 × 19 =
  13. 13.14 × 98 =
  14. 14.7 × 9 =
  15. 15.5 × 9 =
  16. 16.14 × 49 =
  17. 17.4 × 19 =
  18. 18.14 × 19 =
  19. 19.13 × 9 =
  20. 20.10 × 29 =
  21. 21.7 × 49 =
  22. 22.12 × 9 =
  23. 23.11 × 99 =
  24. 24.11 × 19 =
  25. 25.18 × 98 =
  26. 26.12 × 49 =
  27. 27.6 × 49 =
  28. 28.4 × 9 =
  29. 29.39 × 99 =
  30. 30.10 × 49 =
  31. 31.3 × 19 =
  32. 32.11 × 49 =
  33. 33.6 × 9 =
  34. 34.31 × 98 =
  35. 35.7 × 9 =
  36. 36.3 × 9 =
  37. 37.14 × 29 =
  38. 38.3 × 49 =
  39. 39.11 × 29 =
  40. 40.11 × 9 =

Answer key

  1. 735
  2. 99
  3. 145
  4. 81
  5. 190
  6. 174
  7. 203
  8. 588
  9. 2574
  10. 152
  11. 57
  12. 285
  13. 1372
  14. 63
  15. 45
  16. 686
  17. 76
  18. 266
  19. 117
  20. 290
  21. 343
  22. 108
  23. 1089
  24. 209
  25. 1764
  26. 588
  27. 294
  28. 36
  29. 3861
  30. 490
  31. 57
  32. 539
  33. 54
  34. 3038
  35. 63
  36. 27
  37. 406
  38. 147
  39. 319
  40. 99

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