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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 461 · 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. 1.9 × 9 =
  2. 2.10 × 9 =
  3. 3.8 × 19 =
  4. 4.32 × 98 =
  5. 5.9 × 99 =
  6. 6.3 × 9 =
  7. 7.4 × 29 =
  8. 8.8 × 49 =
  9. 9.6 × 9 =
  10. 10.8 × 9 =
  11. 11.14 × 19 =
  12. 12.10 × 49 =
  13. 13.11 × 29 =
  14. 14.22 × 99 =
  15. 15.8 × 99 =
  16. 16.14 × 99 =
  17. 17.3 × 9 =
  18. 18.10 × 19 =
  19. 19.10 × 19 =
  20. 20.6 × 49 =
  21. 21.10 × 9 =
  22. 22.12 × 9 =
  23. 23.7 × 9 =
  24. 24.10 × 19 =
  25. 25.37 × 98 =
  26. 26.10 × 49 =
  27. 27.5 × 29 =
  28. 28.9 × 29 =
  29. 29.14 × 19 =
  30. 30.11 × 9 =
  31. 31.12 × 49 =
  32. 32.38 × 99 =
  33. 33.14 × 29 =
  34. 34.9 × 29 =
  35. 35.8 × 19 =
  36. 36.3 × 29 =
  37. 37.6 × 49 =
  38. 38.24 × 98 =
  39. 39.13 × 9 =
  40. 40.8 × 19 =

Answer key

  1. 81
  2. 90
  3. 152
  4. 3136
  5. 891
  6. 27
  7. 116
  8. 392
  9. 54
  10. 72
  11. 266
  12. 490
  13. 319
  14. 2178
  15. 792
  16. 1386
  17. 27
  18. 190
  19. 190
  20. 294
  21. 90
  22. 108
  23. 63
  24. 190
  25. 3626
  26. 490
  27. 145
  28. 261
  29. 266
  30. 99
  31. 588
  32. 3762
  33. 406
  34. 261
  35. 152
  36. 87
  37. 294
  38. 2352
  39. 117
  40. 152

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