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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 550 · 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. 1.39 × 98 =
  2. 2.4 × 19 =
  3. 3.6 × 19 =
  4. 4.14 × 29 =
  5. 5.15 × 49 =
  6. 6.8 × 19 =
  7. 7.7 × 98 =
  8. 8.5 × 49 =
  9. 9.3 × 98 =
  10. 10.24 × 99 =
  11. 11.5 × 19 =
  12. 12.13 × 9 =
  13. 13.39 × 98 =
  14. 14.32 × 98 =
  15. 15.11 × 9 =
  16. 16.14 × 49 =
  17. 17.8 × 49 =
  18. 18.36 × 99 =
  19. 19.12 × 29 =
  20. 20.9 × 49 =
  21. 21.13 × 19 =
  22. 22.15 × 29 =
  23. 23.4 × 49 =
  24. 24.15 × 49 =
  25. 25.3 × 98 =
  26. 26.28 × 98 =
  27. 27.11 × 49 =
  28. 28.5 × 19 =
  29. 29.9 × 49 =
  30. 30.6 × 99 =
  31. 31.13 × 99 =
  32. 32.7 × 98 =
  33. 33.6 × 98 =
  34. 34.12 × 49 =
  35. 35.8 × 19 =
  36. 36.6 × 9 =
  37. 37.32 × 98 =
  38. 38.33 × 99 =
  39. 39.8 × 9 =
  40. 40.14 × 19 =

Answer key

  1. 3822
  2. 76
  3. 114
  4. 406
  5. 735
  6. 152
  7. 686
  8. 245
  9. 294
  10. 2376
  11. 95
  12. 117
  13. 3822
  14. 3136
  15. 99
  16. 686
  17. 392
  18. 3564
  19. 348
  20. 441
  21. 247
  22. 435
  23. 196
  24. 735
  25. 294
  26. 2744
  27. 539
  28. 95
  29. 441
  30. 594
  31. 1287
  32. 686
  33. 588
  34. 588
  35. 152
  36. 54
  37. 3136
  38. 3267
  39. 72
  40. 266

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