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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 427 · 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. 1.32 × 99 =
  2. 2.14 × 98 =
  3. 3.10 × 9 =
  4. 4.12 × 19 =
  5. 5.9 × 98 =
  6. 6.6 × 19 =
  7. 7.19 × 99 =
  8. 8.5 × 99 =
  9. 9.38 × 99 =
  10. 10.3 × 29 =
  11. 11.8 × 9 =
  12. 12.8 × 98 =
  13. 13.29 × 98 =
  14. 14.6 × 49 =
  15. 15.7 × 49 =
  16. 16.17 × 99 =
  17. 17.6 × 19 =
  18. 18.8 × 9 =
  19. 19.30 × 98 =
  20. 20.4 × 49 =
  21. 21.5 × 19 =
  22. 22.14 × 29 =
  23. 23.9 × 19 =
  24. 24.4 × 49 =
  25. 25.36 × 99 =
  26. 26.8 × 19 =
  27. 27.6 × 9 =
  28. 28.6 × 19 =
  29. 29.3 × 49 =
  30. 30.3 × 49 =
  31. 31.4 × 49 =
  32. 32.12 × 49 =
  33. 33.14 × 49 =
  34. 34.5 × 49 =
  35. 35.37 × 99 =
  36. 36.18 × 99 =
  37. 37.4 × 19 =
  38. 38.6 × 49 =
  39. 39.28 × 98 =
  40. 40.4 × 9 =

Answer key

  1. 3168
  2. 1372
  3. 90
  4. 228
  5. 882
  6. 114
  7. 1881
  8. 495
  9. 3762
  10. 87
  11. 72
  12. 784
  13. 2842
  14. 294
  15. 343
  16. 1683
  17. 114
  18. 72
  19. 2940
  20. 196
  21. 95
  22. 406
  23. 171
  24. 196
  25. 3564
  26. 152
  27. 54
  28. 114
  29. 147
  30. 147
  31. 196
  32. 588
  33. 686
  34. 245
  35. 3663
  36. 1782
  37. 76
  38. 294
  39. 2744
  40. 36

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