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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 456 · 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. 1.22 × 99 =
  2. 2.36 × 98 =
  3. 3.26 × 99 =
  4. 4.3 × 29 =
  5. 5.14 × 9 =
  6. 6.10 × 9 =
  7. 7.10 × 19 =
  8. 8.12 × 19 =
  9. 9.16 × 99 =
  10. 10.10 × 19 =
  11. 11.4 × 19 =
  12. 12.4 × 49 =
  13. 13.8 × 9 =
  14. 14.6 × 49 =
  15. 15.3 × 98 =
  16. 16.12 × 9 =
  17. 17.13 × 49 =
  18. 18.7 × 29 =
  19. 19.13 × 9 =
  20. 20.7 × 49 =
  21. 21.21 × 99 =
  22. 22.8 × 98 =
  23. 23.39 × 99 =
  24. 24.15 × 29 =
  25. 25.12 × 99 =
  26. 26.39 × 99 =
  27. 27.10 × 49 =
  28. 28.13 × 49 =
  29. 29.3 × 29 =
  30. 30.12 × 9 =
  31. 31.18 × 99 =
  32. 32.4 × 19 =
  33. 33.7 × 49 =
  34. 34.13 × 9 =
  35. 35.3 × 19 =
  36. 36.5 × 98 =
  37. 37.3 × 9 =
  38. 38.15 × 19 =
  39. 39.14 × 19 =
  40. 40.9 × 29 =

Answer key

  1. 2178
  2. 3528
  3. 2574
  4. 87
  5. 126
  6. 90
  7. 190
  8. 228
  9. 1584
  10. 190
  11. 76
  12. 196
  13. 72
  14. 294
  15. 294
  16. 108
  17. 637
  18. 203
  19. 117
  20. 343
  21. 2079
  22. 784
  23. 3861
  24. 435
  25. 1188
  26. 3861
  27. 490
  28. 637
  29. 87
  30. 108
  31. 1782
  32. 76
  33. 343
  34. 117
  35. 57
  36. 490
  37. 27
  38. 285
  39. 266
  40. 261

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