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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 371 · 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 × 29 =
  2. 2.16 × 98 =
  3. 3.6 × 9 =
  4. 4.39 × 99 =
  5. 5.10 × 29 =
  6. 6.11 × 98 =
  7. 7.24 × 98 =
  8. 8.11 × 49 =
  9. 9.13 × 19 =
  10. 10.3 × 29 =
  11. 11.8 × 9 =
  12. 12.15 × 29 =
  13. 13.40 × 98 =
  14. 14.9 × 29 =
  15. 15.5 × 19 =
  16. 16.5 × 19 =
  17. 17.9 × 49 =
  18. 18.15 × 49 =
  19. 19.10 × 98 =
  20. 20.10 × 9 =
  21. 21.4 × 49 =
  22. 22.39 × 98 =
  23. 23.13 × 29 =
  24. 24.4 × 9 =
  25. 25.4 × 9 =
  26. 26.12 × 9 =
  27. 27.4 × 19 =
  28. 28.4 × 29 =
  29. 29.6 × 19 =
  30. 30.5 × 9 =
  31. 31.12 × 9 =
  32. 32.15 × 49 =
  33. 33.5 × 98 =
  34. 34.24 × 98 =
  35. 35.37 × 98 =
  36. 36.10 × 49 =
  37. 37.4 × 19 =
  38. 38.4 × 19 =
  39. 39.40 × 99 =
  40. 40.14 × 98 =

Answer key

  1. 145
  2. 1568
  3. 54
  4. 3861
  5. 290
  6. 1078
  7. 2352
  8. 539
  9. 247
  10. 87
  11. 72
  12. 435
  13. 3920
  14. 261
  15. 95
  16. 95
  17. 441
  18. 735
  19. 980
  20. 90
  21. 196
  22. 3822
  23. 377
  24. 36
  25. 36
  26. 108
  27. 76
  28. 116
  29. 114
  30. 45
  31. 108
  32. 735
  33. 490
  34. 2352
  35. 3626
  36. 490
  37. 76
  38. 76
  39. 3960
  40. 1372

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