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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 688 · 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. 1.3 × 9 =
  2. 2.13 × 49 =
  3. 3.28 × 99 =
  4. 4.3 × 29 =
  5. 5.10 × 9 =
  6. 6.3 × 29 =
  7. 7.10 × 19 =
  8. 8.9 × 19 =
  9. 9.9 × 49 =
  10. 10.3 × 9 =
  11. 11.5 × 19 =
  12. 12.11 × 29 =
  13. 13.9 × 29 =
  14. 14.11 × 9 =
  15. 15.4 × 19 =
  16. 16.16 × 98 =
  17. 17.6 × 99 =
  18. 18.14 × 29 =
  19. 19.12 × 49 =
  20. 20.3 × 29 =
  21. 21.10 × 49 =
  22. 22.24 × 98 =
  23. 23.12 × 9 =
  24. 24.30 × 99 =
  25. 25.13 × 9 =
  26. 26.7 × 9 =
  27. 27.17 × 99 =
  28. 28.13 × 49 =
  29. 29.8 × 9 =
  30. 30.7 × 49 =
  31. 31.3 × 29 =
  32. 32.14 × 19 =
  33. 33.3 × 19 =
  34. 34.14 × 19 =
  35. 35.36 × 98 =
  36. 36.14 × 9 =
  37. 37.12 × 9 =
  38. 38.13 × 19 =
  39. 39.4 × 19 =
  40. 40.4 × 19 =

Answer key

  1. 27
  2. 637
  3. 2772
  4. 87
  5. 90
  6. 87
  7. 190
  8. 171
  9. 441
  10. 27
  11. 95
  12. 319
  13. 261
  14. 99
  15. 76
  16. 1568
  17. 594
  18. 406
  19. 588
  20. 87
  21. 490
  22. 2352
  23. 108
  24. 2970
  25. 117
  26. 63
  27. 1683
  28. 637
  29. 72
  30. 343
  31. 87
  32. 266
  33. 57
  34. 266
  35. 3528
  36. 126
  37. 108
  38. 247
  39. 76
  40. 76

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