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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 698 · 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. 1.13 × 99 =
  2. 2.29 × 98 =
  3. 3.3 × 9 =
  4. 4.9 × 49 =
  5. 5.5 × 49 =
  6. 6.8 × 9 =
  7. 7.3 × 9 =
  8. 8.9 × 29 =
  9. 9.8 × 29 =
  10. 10.31 × 98 =
  11. 11.7 × 9 =
  12. 12.9 × 29 =
  13. 13.10 × 9 =
  14. 14.10 × 29 =
  15. 15.7 × 49 =
  16. 16.40 × 98 =
  17. 17.9 × 19 =
  18. 18.11 × 29 =
  19. 19.14 × 49 =
  20. 20.3 × 19 =
  21. 21.10 × 19 =
  22. 22.13 × 49 =
  23. 23.15 × 49 =
  24. 24.4 × 49 =
  25. 25.14 × 19 =
  26. 26.15 × 19 =
  27. 27.4 × 49 =
  28. 28.3 × 29 =
  29. 29.22 × 98 =
  30. 30.8 × 98 =
  31. 31.14 × 29 =
  32. 32.15 × 9 =
  33. 33.28 × 98 =
  34. 34.14 × 98 =
  35. 35.14 × 29 =
  36. 36.17 × 99 =
  37. 37.14 × 98 =
  38. 38.37 × 98 =
  39. 39.32 × 99 =
  40. 40.6 × 9 =

Answer key

  1. 1287
  2. 2842
  3. 27
  4. 441
  5. 245
  6. 72
  7. 27
  8. 261
  9. 232
  10. 3038
  11. 63
  12. 261
  13. 90
  14. 290
  15. 343
  16. 3920
  17. 171
  18. 319
  19. 686
  20. 57
  21. 190
  22. 637
  23. 735
  24. 196
  25. 266
  26. 285
  27. 196
  28. 87
  29. 2156
  30. 784
  31. 406
  32. 135
  33. 2744
  34. 1372
  35. 406
  36. 1683
  37. 1372
  38. 3626
  39. 3168
  40. 54

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