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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 500 · 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 × 98 =
  2. 2.9 × 9 =
  3. 3.11 × 29 =
  4. 4.11 × 29 =
  5. 5.10 × 49 =
  6. 6.6 × 19 =
  7. 7.40 × 98 =
  8. 8.9 × 19 =
  9. 9.3 × 49 =
  10. 10.4 × 19 =
  11. 11.18 × 98 =
  12. 12.3 × 49 =
  13. 13.8 × 49 =
  14. 14.10 × 98 =
  15. 15.5 × 98 =
  16. 16.15 × 49 =
  17. 17.14 × 29 =
  18. 18.33 × 98 =
  19. 19.5 × 49 =
  20. 20.6 × 19 =
  21. 21.15 × 29 =
  22. 22.12 × 99 =
  23. 23.9 × 29 =
  24. 24.5 × 98 =
  25. 25.13 × 29 =
  26. 26.11 × 9 =
  27. 27.4 × 49 =
  28. 28.4 × 49 =
  29. 29.28 × 99 =
  30. 30.17 × 99 =
  31. 31.10 × 29 =
  32. 32.39 × 99 =
  33. 33.8 × 49 =
  34. 34.3 × 29 =
  35. 35.18 × 99 =
  36. 36.23 × 98 =
  37. 37.8 × 9 =
  38. 38.18 × 98 =
  39. 39.12 × 49 =
  40. 40.12 × 19 =

Answer key

  1. 490
  2. 81
  3. 319
  4. 319
  5. 490
  6. 114
  7. 3920
  8. 171
  9. 147
  10. 76
  11. 1764
  12. 147
  13. 392
  14. 980
  15. 490
  16. 735
  17. 406
  18. 3234
  19. 245
  20. 114
  21. 435
  22. 1188
  23. 261
  24. 490
  25. 377
  26. 99
  27. 196
  28. 196
  29. 2772
  30. 1683
  31. 290
  32. 3861
  33. 392
  34. 87
  35. 1782
  36. 2254
  37. 72
  38. 1764
  39. 588
  40. 228

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