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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 73 · 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. 1.10 × 9 =
  2. 2.8 × 9 =
  3. 3.6 × 9 =
  4. 4.6 × 49 =
  5. 5.19 × 98 =
  6. 6.7 × 29 =
  7. 7.8 × 19 =
  8. 8.37 × 98 =
  9. 9.5 × 9 =
  10. 10.14 × 9 =
  11. 11.34 × 98 =
  12. 12.4 × 98 =
  13. 13.14 × 9 =
  14. 14.5 × 49 =
  15. 15.31 × 99 =
  16. 16.5 × 98 =
  17. 17.5 × 29 =
  18. 18.9 × 99 =
  19. 19.9 × 19 =
  20. 20.39 × 98 =
  21. 21.13 × 19 =
  22. 22.4 × 98 =
  23. 23.11 × 19 =
  24. 24.12 × 9 =
  25. 25.8 × 9 =
  26. 26.5 × 9 =
  27. 27.5 × 99 =
  28. 28.7 × 99 =
  29. 29.11 × 49 =
  30. 30.30 × 99 =
  31. 31.8 × 49 =
  32. 32.4 × 29 =
  33. 33.18 × 98 =
  34. 34.31 × 99 =
  35. 35.15 × 98 =
  36. 36.6 × 19 =
  37. 37.8 × 98 =
  38. 38.40 × 98 =
  39. 39.20 × 99 =
  40. 40.14 × 19 =

Answer key

  1. 90
  2. 72
  3. 54
  4. 294
  5. 1862
  6. 203
  7. 152
  8. 3626
  9. 45
  10. 126
  11. 3332
  12. 392
  13. 126
  14. 245
  15. 3069
  16. 490
  17. 145
  18. 891
  19. 171
  20. 3822
  21. 247
  22. 392
  23. 209
  24. 108
  25. 72
  26. 45
  27. 495
  28. 693
  29. 539
  30. 2970
  31. 392
  32. 116
  33. 1764
  34. 3069
  35. 1470
  36. 114
  37. 784
  38. 3920
  39. 1980
  40. 266

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