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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 33 · 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. 1.35 × 98 =
  2. 2.10 × 49 =
  3. 3.28 × 98 =
  4. 4.14 × 49 =
  5. 5.6 × 19 =
  6. 6.17 × 99 =
  7. 7.13 × 19 =
  8. 8.6 × 29 =
  9. 9.10 × 19 =
  10. 10.11 × 29 =
  11. 11.4 × 19 =
  12. 12.9 × 29 =
  13. 13.22 × 99 =
  14. 14.3 × 49 =
  15. 15.5 × 99 =
  16. 16.18 × 99 =
  17. 17.11 × 9 =
  18. 18.7 × 49 =
  19. 19.39 × 99 =
  20. 20.16 × 99 =
  21. 21.4 × 49 =
  22. 22.8 × 49 =
  23. 23.12 × 29 =
  24. 24.6 × 9 =
  25. 25.8 × 29 =
  26. 26.13 × 49 =
  27. 27.3 × 29 =
  28. 28.6 × 49 =
  29. 29.3 × 29 =
  30. 30.7 × 29 =
  31. 31.3 × 49 =
  32. 32.12 × 49 =
  33. 33.14 × 9 =
  34. 34.35 × 99 =
  35. 35.11 × 29 =
  36. 36.3 × 9 =
  37. 37.12 × 19 =
  38. 38.12 × 9 =
  39. 39.15 × 19 =
  40. 40.37 × 99 =

Answer key

  1. 3430
  2. 490
  3. 2744
  4. 686
  5. 114
  6. 1683
  7. 247
  8. 174
  9. 190
  10. 319
  11. 76
  12. 261
  13. 2178
  14. 147
  15. 495
  16. 1782
  17. 99
  18. 343
  19. 3861
  20. 1584
  21. 196
  22. 392
  23. 348
  24. 54
  25. 232
  26. 637
  27. 87
  28. 294
  29. 87
  30. 203
  31. 147
  32. 588
  33. 126
  34. 3465
  35. 319
  36. 27
  37. 228
  38. 108
  39. 285
  40. 3663

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