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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 342 · 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 × 9 =
  2. 2.4 × 98 =
  3. 3.17 × 99 =
  4. 4.8 × 9 =
  5. 5.12 × 49 =
  6. 6.20 × 99 =
  7. 7.19 × 98 =
  8. 8.9 × 98 =
  9. 9.18 × 99 =
  10. 10.12 × 29 =
  11. 11.3 × 9 =
  12. 12.28 × 99 =
  13. 13.5 × 99 =
  14. 14.11 × 29 =
  15. 15.4 × 49 =
  16. 16.12 × 29 =
  17. 17.3 × 19 =
  18. 18.10 × 49 =
  19. 19.5 × 19 =
  20. 20.3 × 9 =
  21. 21.9 × 98 =
  22. 22.13 × 9 =
  23. 23.12 × 98 =
  24. 24.14 × 98 =
  25. 25.25 × 98 =
  26. 26.5 × 9 =
  27. 27.4 × 98 =
  28. 28.7 × 99 =
  29. 29.9 × 9 =
  30. 30.39 × 99 =
  31. 31.4 × 19 =
  32. 32.9 × 49 =
  33. 33.9 × 49 =
  34. 34.5 × 19 =
  35. 35.4 × 9 =
  36. 36.12 × 29 =
  37. 37.15 × 98 =
  38. 38.24 × 99 =
  39. 39.4 × 29 =
  40. 40.36 × 98 =

Answer key

  1. 45
  2. 392
  3. 1683
  4. 72
  5. 588
  6. 1980
  7. 1862
  8. 882
  9. 1782
  10. 348
  11. 27
  12. 2772
  13. 495
  14. 319
  15. 196
  16. 348
  17. 57
  18. 490
  19. 95
  20. 27
  21. 882
  22. 117
  23. 1176
  24. 1372
  25. 2450
  26. 45
  27. 392
  28. 693
  29. 81
  30. 3861
  31. 76
  32. 441
  33. 441
  34. 95
  35. 36
  36. 348
  37. 1470
  38. 2376
  39. 116
  40. 3528

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