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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 872 · 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. 1.20 × 99 =
  2. 2.26 × 98 =
  3. 3.20 × 98 =
  4. 4.12 × 9 =
  5. 5.8 × 19 =
  6. 6.39 × 99 =
  7. 7.6 × 9 =
  8. 8.4 × 9 =
  9. 9.16 × 98 =
  10. 10.4 × 29 =
  11. 11.14 × 49 =
  12. 12.3 × 19 =
  13. 13.14 × 9 =
  14. 14.7 × 9 =
  15. 15.9 × 49 =
  16. 16.14 × 29 =
  17. 17.15 × 9 =
  18. 18.34 × 99 =
  19. 19.3 × 9 =
  20. 20.11 × 99 =
  21. 21.24 × 98 =
  22. 22.9 × 98 =
  23. 23.25 × 99 =
  24. 24.38 × 99 =
  25. 25.10 × 9 =
  26. 26.39 × 98 =
  27. 27.15 × 19 =
  28. 28.13 × 9 =
  29. 29.13 × 9 =
  30. 30.19 × 99 =
  31. 31.32 × 98 =
  32. 32.3 × 29 =
  33. 33.17 × 99 =
  34. 34.32 × 99 =
  35. 35.10 × 29 =
  36. 36.11 × 98 =
  37. 37.3 × 29 =
  38. 38.4 × 29 =
  39. 39.12 × 49 =
  40. 40.21 × 99 =

Answer key

  1. 1980
  2. 2548
  3. 1960
  4. 108
  5. 152
  6. 3861
  7. 54
  8. 36
  9. 1568
  10. 116
  11. 686
  12. 57
  13. 126
  14. 63
  15. 441
  16. 406
  17. 135
  18. 3366
  19. 27
  20. 1089
  21. 2352
  22. 882
  23. 2475
  24. 3762
  25. 90
  26. 3822
  27. 285
  28. 117
  29. 117
  30. 1881
  31. 3136
  32. 87
  33. 1683
  34. 3168
  35. 290
  36. 1078
  37. 87
  38. 116
  39. 588
  40. 2079

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