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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 142 · 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. 1.28 × 98 =
  2. 2.39 × 99 =
  3. 3.9 × 9 =
  4. 4.9 × 9 =
  5. 5.8 × 99 =
  6. 6.9 × 29 =
  7. 7.11 × 98 =
  8. 8.6 × 29 =
  9. 9.5 × 49 =
  10. 10.37 × 98 =
  11. 11.6 × 29 =
  12. 12.10 × 29 =
  13. 13.6 × 29 =
  14. 14.9 × 49 =
  15. 15.5 × 19 =
  16. 16.4 × 9 =
  17. 17.3 × 9 =
  18. 18.38 × 98 =
  19. 19.10 × 19 =
  20. 20.37 × 99 =
  21. 21.10 × 29 =
  22. 22.5 × 49 =
  23. 23.7 × 99 =
  24. 24.10 × 19 =
  25. 25.5 × 49 =
  26. 26.28 × 98 =
  27. 27.7 × 19 =
  28. 28.16 × 99 =
  29. 29.5 × 98 =
  30. 30.4 × 19 =
  31. 31.12 × 49 =
  32. 32.14 × 9 =
  33. 33.8 × 9 =
  34. 34.15 × 9 =
  35. 35.10 × 49 =
  36. 36.6 × 29 =
  37. 37.6 × 29 =
  38. 38.6 × 19 =
  39. 39.4 × 49 =
  40. 40.13 × 9 =

Answer key

  1. 2744
  2. 3861
  3. 81
  4. 81
  5. 792
  6. 261
  7. 1078
  8. 174
  9. 245
  10. 3626
  11. 174
  12. 290
  13. 174
  14. 441
  15. 95
  16. 36
  17. 27
  18. 3724
  19. 190
  20. 3663
  21. 290
  22. 245
  23. 693
  24. 190
  25. 245
  26. 2744
  27. 133
  28. 1584
  29. 490
  30. 76
  31. 588
  32. 126
  33. 72
  34. 135
  35. 490
  36. 174
  37. 174
  38. 114
  39. 196
  40. 117

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