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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 405 · 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. 1.5 × 49 =
  2. 2.5 × 98 =
  3. 3.4 × 49 =
  4. 4.14 × 29 =
  5. 5.3 × 29 =
  6. 6.21 × 98 =
  7. 7.10 × 49 =
  8. 8.39 × 99 =
  9. 9.4 × 49 =
  10. 10.4 × 29 =
  11. 11.7 × 9 =
  12. 12.13 × 49 =
  13. 13.9 × 9 =
  14. 14.8 × 49 =
  15. 15.6 × 99 =
  16. 16.8 × 49 =
  17. 17.3 × 49 =
  18. 18.10 × 9 =
  19. 19.15 × 19 =
  20. 20.3 × 49 =
  21. 21.14 × 19 =
  22. 22.14 × 49 =
  23. 23.4 × 19 =
  24. 24.22 × 99 =
  25. 25.5 × 9 =
  26. 26.7 × 49 =
  27. 27.31 × 99 =
  28. 28.13 × 19 =
  29. 29.5 × 49 =
  30. 30.22 × 99 =
  31. 31.4 × 19 =
  32. 32.4 × 29 =
  33. 33.9 × 9 =
  34. 34.9 × 19 =
  35. 35.26 × 99 =
  36. 36.14 × 9 =
  37. 37.40 × 98 =
  38. 38.4 × 9 =
  39. 39.12 × 9 =
  40. 40.13 × 29 =

Answer key

  1. 245
  2. 490
  3. 196
  4. 406
  5. 87
  6. 2058
  7. 490
  8. 3861
  9. 196
  10. 116
  11. 63
  12. 637
  13. 81
  14. 392
  15. 594
  16. 392
  17. 147
  18. 90
  19. 285
  20. 147
  21. 266
  22. 686
  23. 76
  24. 2178
  25. 45
  26. 343
  27. 3069
  28. 247
  29. 245
  30. 2178
  31. 76
  32. 116
  33. 81
  34. 171
  35. 2574
  36. 126
  37. 3920
  38. 36
  39. 108
  40. 377

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