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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 686 · 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. 1.13 × 9 =
  2. 2.8 × 9 =
  3. 3.8 × 49 =
  4. 4.7 × 98 =
  5. 5.17 × 99 =
  6. 6.39 × 99 =
  7. 7.11 × 9 =
  8. 8.30 × 98 =
  9. 9.3 × 29 =
  10. 10.37 × 99 =
  11. 11.7 × 29 =
  12. 12.8 × 19 =
  13. 13.5 × 49 =
  14. 14.7 × 49 =
  15. 15.6 × 9 =
  16. 16.14 × 29 =
  17. 17.3 × 29 =
  18. 18.15 × 49 =
  19. 19.8 × 9 =
  20. 20.9 × 49 =
  21. 21.11 × 98 =
  22. 22.12 × 9 =
  23. 23.29 × 99 =
  24. 24.5 × 29 =
  25. 25.9 × 98 =
  26. 26.12 × 98 =
  27. 27.5 × 49 =
  28. 28.4 × 9 =
  29. 29.5 × 49 =
  30. 30.13 × 49 =
  31. 31.20 × 99 =
  32. 32.6 × 49 =
  33. 33.13 × 49 =
  34. 34.9 × 19 =
  35. 35.35 × 98 =
  36. 36.9 × 19 =
  37. 37.5 × 29 =
  38. 38.11 × 19 =
  39. 39.5 × 29 =
  40. 40.14 × 99 =

Answer key

  1. 117
  2. 72
  3. 392
  4. 686
  5. 1683
  6. 3861
  7. 99
  8. 2940
  9. 87
  10. 3663
  11. 203
  12. 152
  13. 245
  14. 343
  15. 54
  16. 406
  17. 87
  18. 735
  19. 72
  20. 441
  21. 1078
  22. 108
  23. 2871
  24. 145
  25. 882
  26. 1176
  27. 245
  28. 36
  29. 245
  30. 637
  31. 1980
  32. 294
  33. 637
  34. 171
  35. 3430
  36. 171
  37. 145
  38. 209
  39. 145
  40. 1386

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