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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 346 · 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. 1.14 × 9 =
  2. 2.24 × 99 =
  3. 3.29 × 98 =
  4. 4.13 × 19 =
  5. 5.3 × 9 =
  6. 6.5 × 49 =
  7. 7.9 × 19 =
  8. 8.13 × 49 =
  9. 9.10 × 9 =
  10. 10.15 × 49 =
  11. 11.39 × 99 =
  12. 12.22 × 99 =
  13. 13.13 × 29 =
  14. 14.7 × 19 =
  15. 15.3 × 29 =
  16. 16.9 × 98 =
  17. 17.7 × 19 =
  18. 18.10 × 19 =
  19. 19.8 × 99 =
  20. 20.4 × 98 =
  21. 21.14 × 9 =
  22. 22.9 × 49 =
  23. 23.12 × 49 =
  24. 24.13 × 98 =
  25. 25.5 × 9 =
  26. 26.5 × 19 =
  27. 27.10 × 9 =
  28. 28.3 × 9 =
  29. 29.9 × 19 =
  30. 30.26 × 99 =
  31. 31.7 × 49 =
  32. 32.20 × 99 =
  33. 33.3 × 29 =
  34. 34.9 × 9 =
  35. 35.4 × 49 =
  36. 36.11 × 9 =
  37. 37.19 × 98 =
  38. 38.15 × 49 =
  39. 39.20 × 98 =
  40. 40.3 × 49 =

Answer key

  1. 126
  2. 2376
  3. 2842
  4. 247
  5. 27
  6. 245
  7. 171
  8. 637
  9. 90
  10. 735
  11. 3861
  12. 2178
  13. 377
  14. 133
  15. 87
  16. 882
  17. 133
  18. 190
  19. 792
  20. 392
  21. 126
  22. 441
  23. 588
  24. 1274
  25. 45
  26. 95
  27. 90
  28. 27
  29. 171
  30. 2574
  31. 343
  32. 1980
  33. 87
  34. 81
  35. 196
  36. 99
  37. 1862
  38. 735
  39. 1960
  40. 147

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