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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 138 · 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. 1.9 × 29 =
  2. 2.38 × 99 =
  3. 3.30 × 98 =
  4. 4.7 × 19 =
  5. 5.38 × 98 =
  6. 6.14 × 49 =
  7. 7.14 × 19 =
  8. 8.9 × 19 =
  9. 9.3 × 29 =
  10. 10.18 × 99 =
  11. 11.3 × 19 =
  12. 12.5 × 29 =
  13. 13.14 × 9 =
  14. 14.3 × 49 =
  15. 15.14 × 9 =
  16. 16.3 × 9 =
  17. 17.14 × 19 =
  18. 18.14 × 29 =
  19. 19.15 × 29 =
  20. 20.36 × 99 =
  21. 21.14 × 9 =
  22. 22.28 × 98 =
  23. 23.31 × 98 =
  24. 24.9 × 98 =
  25. 25.5 × 19 =
  26. 26.12 × 49 =
  27. 27.12 × 49 =
  28. 28.30 × 98 =
  29. 29.31 × 99 =
  30. 30.12 × 9 =
  31. 31.3 × 9 =
  32. 32.8 × 99 =
  33. 33.4 × 29 =
  34. 34.6 × 9 =
  35. 35.7 × 49 =
  36. 36.4 × 49 =
  37. 37.32 × 99 =
  38. 38.12 × 9 =
  39. 39.18 × 99 =
  40. 40.10 × 49 =

Answer key

  1. 261
  2. 3762
  3. 2940
  4. 133
  5. 3724
  6. 686
  7. 266
  8. 171
  9. 87
  10. 1782
  11. 57
  12. 145
  13. 126
  14. 147
  15. 126
  16. 27
  17. 266
  18. 406
  19. 435
  20. 3564
  21. 126
  22. 2744
  23. 3038
  24. 882
  25. 95
  26. 588
  27. 588
  28. 2940
  29. 3069
  30. 108
  31. 27
  32. 792
  33. 116
  34. 54
  35. 343
  36. 196
  37. 3168
  38. 108
  39. 1782
  40. 490

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