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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 604 · 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. 1.21 × 99 =
  2. 2.39 × 99 =
  3. 3.8 × 9 =
  4. 4.22 × 99 =
  5. 5.27 × 98 =
  6. 6.8 × 29 =
  7. 7.6 × 29 =
  8. 8.10 × 9 =
  9. 9.5 × 29 =
  10. 10.5 × 19 =
  11. 11.5 × 9 =
  12. 12.10 × 29 =
  13. 13.4 × 99 =
  14. 14.6 × 29 =
  15. 15.5 × 29 =
  16. 16.14 × 19 =
  17. 17.8 × 9 =
  18. 18.6 × 98 =
  19. 19.5 × 19 =
  20. 20.10 × 29 =
  21. 21.7 × 9 =
  22. 22.13 × 9 =
  23. 23.7 × 29 =
  24. 24.3 × 9 =
  25. 25.5 × 19 =
  26. 26.7 × 99 =
  27. 27.8 × 29 =
  28. 28.8 × 19 =
  29. 29.31 × 99 =
  30. 30.14 × 29 =
  31. 31.14 × 98 =
  32. 32.28 × 99 =
  33. 33.9 × 19 =
  34. 34.11 × 19 =
  35. 35.13 × 49 =
  36. 36.34 × 98 =
  37. 37.37 × 99 =
  38. 38.10 × 19 =
  39. 39.6 × 9 =
  40. 40.3 × 49 =

Answer key

  1. 2079
  2. 3861
  3. 72
  4. 2178
  5. 2646
  6. 232
  7. 174
  8. 90
  9. 145
  10. 95
  11. 45
  12. 290
  13. 396
  14. 174
  15. 145
  16. 266
  17. 72
  18. 588
  19. 95
  20. 290
  21. 63
  22. 117
  23. 203
  24. 27
  25. 95
  26. 693
  27. 232
  28. 152
  29. 3069
  30. 406
  31. 1372
  32. 2772
  33. 171
  34. 209
  35. 637
  36. 3332
  37. 3663
  38. 190
  39. 54
  40. 147

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