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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 700 · 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. 1.24 × 98 =
  2. 2.7 × 49 =
  3. 3.6 × 9 =
  4. 4.11 × 9 =
  5. 5.13 × 19 =
  6. 6.4 × 19 =
  7. 7.5 × 9 =
  8. 8.12 × 9 =
  9. 9.6 × 9 =
  10. 10.14 × 49 =
  11. 11.9 × 99 =
  12. 12.9 × 19 =
  13. 13.14 × 98 =
  14. 14.8 × 19 =
  15. 15.3 × 19 =
  16. 16.5 × 9 =
  17. 17.18 × 98 =
  18. 18.10 × 49 =
  19. 19.5 × 9 =
  20. 20.10 × 9 =
  21. 21.12 × 99 =
  22. 22.8 × 29 =
  23. 23.8 × 19 =
  24. 24.15 × 49 =
  25. 25.3 × 49 =
  26. 26.13 × 9 =
  27. 27.8 × 49 =
  28. 28.5 × 9 =
  29. 29.4 × 9 =
  30. 30.7 × 99 =
  31. 31.9 × 49 =
  32. 32.3 × 29 =
  33. 33.6 × 49 =
  34. 34.15 × 19 =
  35. 35.13 × 19 =
  36. 36.23 × 99 =
  37. 37.9 × 49 =
  38. 38.9 × 29 =
  39. 39.15 × 19 =
  40. 40.5 × 49 =

Answer key

  1. 2352
  2. 343
  3. 54
  4. 99
  5. 247
  6. 76
  7. 45
  8. 108
  9. 54
  10. 686
  11. 891
  12. 171
  13. 1372
  14. 152
  15. 57
  16. 45
  17. 1764
  18. 490
  19. 45
  20. 90
  21. 1188
  22. 232
  23. 152
  24. 735
  25. 147
  26. 117
  27. 392
  28. 45
  29. 36
  30. 693
  31. 441
  32. 87
  33. 294
  34. 285
  35. 247
  36. 2277
  37. 441
  38. 261
  39. 285
  40. 245

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