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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 482 · 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. 1.10 × 19 =
  2. 2.4 × 49 =
  3. 3.8 × 98 =
  4. 4.5 × 19 =
  5. 5.19 × 99 =
  6. 6.12 × 9 =
  7. 7.3 × 19 =
  8. 8.14 × 29 =
  9. 9.14 × 29 =
  10. 10.10 × 9 =
  11. 11.13 × 9 =
  12. 12.35 × 99 =
  13. 13.3 × 19 =
  14. 14.15 × 49 =
  15. 15.23 × 98 =
  16. 16.5 × 19 =
  17. 17.7 × 29 =
  18. 18.5 × 19 =
  19. 19.14 × 19 =
  20. 20.15 × 49 =
  21. 21.5 × 49 =
  22. 22.5 × 9 =
  23. 23.6 × 49 =
  24. 24.6 × 29 =
  25. 25.5 × 9 =
  26. 26.5 × 9 =
  27. 27.24 × 99 =
  28. 28.6 × 49 =
  29. 29.12 × 29 =
  30. 30.40 × 98 =
  31. 31.13 × 19 =
  32. 32.4 × 19 =
  33. 33.7 × 98 =
  34. 34.12 × 9 =
  35. 35.4 × 9 =
  36. 36.10 × 9 =
  37. 37.14 × 29 =
  38. 38.15 × 29 =
  39. 39.11 × 49 =
  40. 40.8 × 49 =

Answer key

  1. 190
  2. 196
  3. 784
  4. 95
  5. 1881
  6. 108
  7. 57
  8. 406
  9. 406
  10. 90
  11. 117
  12. 3465
  13. 57
  14. 735
  15. 2254
  16. 95
  17. 203
  18. 95
  19. 266
  20. 735
  21. 245
  22. 45
  23. 294
  24. 174
  25. 45
  26. 45
  27. 2376
  28. 294
  29. 348
  30. 3920
  31. 247
  32. 76
  33. 686
  34. 108
  35. 36
  36. 90
  37. 406
  38. 435
  39. 539
  40. 392

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