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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 75 · 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. 1.14 × 29 =
  2. 2.18 × 98 =
  3. 3.8 × 99 =
  4. 4.14 × 49 =
  5. 5.5 × 19 =
  6. 6.8 × 98 =
  7. 7.11 × 9 =
  8. 8.40 × 99 =
  9. 9.12 × 99 =
  10. 10.14 × 29 =
  11. 11.5 × 9 =
  12. 12.14 × 9 =
  13. 13.32 × 98 =
  14. 14.11 × 9 =
  15. 15.29 × 99 =
  16. 16.19 × 98 =
  17. 17.13 × 9 =
  18. 18.11 × 19 =
  19. 19.5 × 9 =
  20. 20.3 × 19 =
  21. 21.6 × 9 =
  22. 22.9 × 99 =
  23. 23.6 × 49 =
  24. 24.13 × 49 =
  25. 25.26 × 99 =
  26. 26.22 × 98 =
  27. 27.4 × 19 =
  28. 28.9 × 49 =
  29. 29.4 × 29 =
  30. 30.5 × 9 =
  31. 31.10 × 49 =
  32. 32.3 × 29 =
  33. 33.3 × 49 =
  34. 34.11 × 29 =
  35. 35.9 × 9 =
  36. 36.14 × 19 =
  37. 37.14 × 9 =
  38. 38.15 × 99 =
  39. 39.5 × 19 =
  40. 40.14 × 19 =

Answer key

  1. 406
  2. 1764
  3. 792
  4. 686
  5. 95
  6. 784
  7. 99
  8. 3960
  9. 1188
  10. 406
  11. 45
  12. 126
  13. 3136
  14. 99
  15. 2871
  16. 1862
  17. 117
  18. 209
  19. 45
  20. 57
  21. 54
  22. 891
  23. 294
  24. 637
  25. 2574
  26. 2156
  27. 76
  28. 441
  29. 116
  30. 45
  31. 490
  32. 87
  33. 147
  34. 319
  35. 81
  36. 266
  37. 126
  38. 1485
  39. 95
  40. 266

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