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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 101 · 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 × 49 =
  2. 2.7 × 9 =
  3. 3.3 × 9 =
  4. 4.12 × 49 =
  5. 5.8 × 49 =
  6. 6.5 × 49 =
  7. 7.13 × 9 =
  8. 8.7 × 19 =
  9. 9.4 × 19 =
  10. 10.35 × 98 =
  11. 11.7 × 99 =
  12. 12.10 × 29 =
  13. 13.8 × 99 =
  14. 14.4 × 49 =
  15. 15.13 × 98 =
  16. 16.15 × 19 =
  17. 17.7 × 99 =
  18. 18.5 × 19 =
  19. 19.3 × 19 =
  20. 20.18 × 99 =
  21. 21.11 × 9 =
  22. 22.15 × 49 =
  23. 23.6 × 29 =
  24. 24.7 × 19 =
  25. 25.7 × 9 =
  26. 26.6 × 29 =
  27. 27.6 × 19 =
  28. 28.6 × 49 =
  29. 29.3 × 9 =
  30. 30.8 × 29 =
  31. 31.8 × 19 =
  32. 32.13 × 49 =
  33. 33.9 × 49 =
  34. 34.9 × 99 =
  35. 35.24 × 98 =
  36. 36.3 × 9 =
  37. 37.13 × 98 =
  38. 38.27 × 98 =
  39. 39.29 × 98 =
  40. 40.19 × 98 =

Answer key

  1. 637
  2. 63
  3. 27
  4. 588
  5. 392
  6. 245
  7. 117
  8. 133
  9. 76
  10. 3430
  11. 693
  12. 290
  13. 792
  14. 196
  15. 1274
  16. 285
  17. 693
  18. 95
  19. 57
  20. 1782
  21. 99
  22. 735
  23. 174
  24. 133
  25. 63
  26. 174
  27. 114
  28. 294
  29. 27
  30. 232
  31. 152
  32. 637
  33. 441
  34. 891
  35. 2352
  36. 27
  37. 1274
  38. 2646
  39. 2842
  40. 1862

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