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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 149 · 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. 1.13 × 99 =
  2. 2.3 × 19 =
  3. 3.33 × 98 =
  4. 4.17 × 99 =
  5. 5.4 × 29 =
  6. 6.39 × 98 =
  7. 7.7 × 99 =
  8. 8.15 × 29 =
  9. 9.16 × 98 =
  10. 10.6 × 49 =
  11. 11.10 × 29 =
  12. 12.14 × 99 =
  13. 13.8 × 98 =
  14. 14.6 × 29 =
  15. 15.29 × 98 =
  16. 16.31 × 99 =
  17. 17.16 × 99 =
  18. 18.10 × 19 =
  19. 19.8 × 9 =
  20. 20.4 × 9 =
  21. 21.3 × 9 =
  22. 22.16 × 98 =
  23. 23.9 × 9 =
  24. 24.15 × 19 =
  25. 25.8 × 19 =
  26. 26.13 × 99 =
  27. 27.13 × 9 =
  28. 28.10 × 9 =
  29. 29.4 × 29 =
  30. 30.13 × 99 =
  31. 31.8 × 49 =
  32. 32.15 × 29 =
  33. 33.24 × 98 =
  34. 34.20 × 99 =
  35. 35.3 × 19 =
  36. 36.29 × 98 =
  37. 37.10 × 9 =
  38. 38.7 × 29 =
  39. 39.12 × 49 =
  40. 40.11 × 98 =

Answer key

  1. 1287
  2. 57
  3. 3234
  4. 1683
  5. 116
  6. 3822
  7. 693
  8. 435
  9. 1568
  10. 294
  11. 290
  12. 1386
  13. 784
  14. 174
  15. 2842
  16. 3069
  17. 1584
  18. 190
  19. 72
  20. 36
  21. 27
  22. 1568
  23. 81
  24. 285
  25. 152
  26. 1287
  27. 117
  28. 90
  29. 116
  30. 1287
  31. 392
  32. 435
  33. 2352
  34. 1980
  35. 57
  36. 2842
  37. 90
  38. 203
  39. 588
  40. 1078

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