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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 253 · 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. 1.24 × 99 =
  2. 2.12 × 19 =
  3. 3.21 × 98 =
  4. 4.9 × 19 =
  5. 5.39 × 99 =
  6. 6.26 × 99 =
  7. 7.8 × 9 =
  8. 8.13 × 49 =
  9. 9.3 × 9 =
  10. 10.15 × 49 =
  11. 11.19 × 99 =
  12. 12.19 × 99 =
  13. 13.3 × 19 =
  14. 14.6 × 99 =
  15. 15.9 × 49 =
  16. 16.11 × 98 =
  17. 17.24 × 98 =
  18. 18.10 × 9 =
  19. 19.14 × 9 =
  20. 20.8 × 99 =
  21. 21.14 × 29 =
  22. 22.10 × 19 =
  23. 23.4 × 9 =
  24. 24.13 × 29 =
  25. 25.13 × 9 =
  26. 26.5 × 19 =
  27. 27.15 × 19 =
  28. 28.35 × 98 =
  29. 29.32 × 98 =
  30. 30.6 × 49 =
  31. 31.5 × 29 =
  32. 32.6 × 19 =
  33. 33.6 × 19 =
  34. 34.13 × 49 =
  35. 35.19 × 98 =
  36. 36.6 × 19 =
  37. 37.12 × 9 =
  38. 38.17 × 98 =
  39. 39.4 × 19 =
  40. 40.9 × 9 =

Answer key

  1. 2376
  2. 228
  3. 2058
  4. 171
  5. 3861
  6. 2574
  7. 72
  8. 637
  9. 27
  10. 735
  11. 1881
  12. 1881
  13. 57
  14. 594
  15. 441
  16. 1078
  17. 2352
  18. 90
  19. 126
  20. 792
  21. 406
  22. 190
  23. 36
  24. 377
  25. 117
  26. 95
  27. 285
  28. 3430
  29. 3136
  30. 294
  31. 145
  32. 114
  33. 114
  34. 637
  35. 1862
  36. 114
  37. 108
  38. 1666
  39. 76
  40. 81

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