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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 886 · 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. 1.7 × 49 =
  2. 2.15 × 29 =
  3. 3.40 × 99 =
  4. 4.5 × 9 =
  5. 5.6 × 19 =
  6. 6.3 × 49 =
  7. 7.5 × 9 =
  8. 8.15 × 19 =
  9. 9.7 × 49 =
  10. 10.39 × 99 =
  11. 11.4 × 19 =
  12. 12.14 × 19 =
  13. 13.6 × 19 =
  14. 14.11 × 9 =
  15. 15.14 × 19 =
  16. 16.6 × 98 =
  17. 17.3 × 29 =
  18. 18.7 × 29 =
  19. 19.22 × 98 =
  20. 20.5 × 49 =
  21. 21.15 × 98 =
  22. 22.9 × 9 =
  23. 23.8 × 9 =
  24. 24.6 × 19 =
  25. 25.13 × 9 =
  26. 26.15 × 9 =
  27. 27.3 × 9 =
  28. 28.13 × 19 =
  29. 29.13 × 9 =
  30. 30.13 × 49 =
  31. 31.25 × 99 =
  32. 32.14 × 9 =
  33. 33.14 × 49 =
  34. 34.3 × 9 =
  35. 35.4 × 29 =
  36. 36.7 × 99 =
  37. 37.26 × 99 =
  38. 38.11 × 98 =
  39. 39.6 × 19 =
  40. 40.4 × 19 =

Answer key

  1. 343
  2. 435
  3. 3960
  4. 45
  5. 114
  6. 147
  7. 45
  8. 285
  9. 343
  10. 3861
  11. 76
  12. 266
  13. 114
  14. 99
  15. 266
  16. 588
  17. 87
  18. 203
  19. 2156
  20. 245
  21. 1470
  22. 81
  23. 72
  24. 114
  25. 117
  26. 135
  27. 27
  28. 247
  29. 117
  30. 637
  31. 2475
  32. 126
  33. 686
  34. 27
  35. 116
  36. 693
  37. 2574
  38. 1078
  39. 114
  40. 76

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