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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 225 · 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. 1.6 × 29 =
  2. 2.6 × 29 =
  3. 3.5 × 19 =
  4. 4.3 × 49 =
  5. 5.4 × 19 =
  6. 6.5 × 98 =
  7. 7.13 × 99 =
  8. 8.12 × 29 =
  9. 9.22 × 99 =
  10. 10.39 × 99 =
  11. 11.28 × 99 =
  12. 12.13 × 49 =
  13. 13.6 × 49 =
  14. 14.10 × 49 =
  15. 15.10 × 99 =
  16. 16.3 × 19 =
  17. 17.5 × 99 =
  18. 18.3 × 49 =
  19. 19.12 × 49 =
  20. 20.39 × 99 =
  21. 21.12 × 19 =
  22. 22.14 × 9 =
  23. 23.14 × 29 =
  24. 24.8 × 99 =
  25. 25.6 × 49 =
  26. 26.14 × 9 =
  27. 27.4 × 49 =
  28. 28.4 × 99 =
  29. 29.14 × 19 =
  30. 30.12 × 98 =
  31. 31.6 × 29 =
  32. 32.6 × 9 =
  33. 33.13 × 99 =
  34. 34.12 × 29 =
  35. 35.18 × 98 =
  36. 36.36 × 99 =
  37. 37.5 × 9 =
  38. 38.4 × 19 =
  39. 39.16 × 98 =
  40. 40.38 × 99 =

Answer key

  1. 174
  2. 174
  3. 95
  4. 147
  5. 76
  6. 490
  7. 1287
  8. 348
  9. 2178
  10. 3861
  11. 2772
  12. 637
  13. 294
  14. 490
  15. 990
  16. 57
  17. 495
  18. 147
  19. 588
  20. 3861
  21. 228
  22. 126
  23. 406
  24. 792
  25. 294
  26. 126
  27. 196
  28. 396
  29. 266
  30. 1176
  31. 174
  32. 54
  33. 1287
  34. 348
  35. 1764
  36. 3564
  37. 45
  38. 76
  39. 1568
  40. 3762

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