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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 338 · 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. 1.6 × 9 =
  2. 2.10 × 9 =
  3. 3.11 × 19 =
  4. 4.8 × 19 =
  5. 5.31 × 98 =
  6. 6.32 × 98 =
  7. 7.6 × 99 =
  8. 8.8 × 49 =
  9. 9.15 × 9 =
  10. 10.4 × 19 =
  11. 11.37 × 98 =
  12. 12.6 × 9 =
  13. 13.14 × 49 =
  14. 14.5 × 49 =
  15. 15.12 × 9 =
  16. 16.11 × 99 =
  17. 17.10 × 98 =
  18. 18.14 × 29 =
  19. 19.14 × 29 =
  20. 20.30 × 99 =
  21. 21.39 × 99 =
  22. 22.10 × 19 =
  23. 23.31 × 98 =
  24. 24.9 × 19 =
  25. 25.12 × 9 =
  26. 26.12 × 49 =
  27. 27.7 × 19 =
  28. 28.33 × 98 =
  29. 29.4 × 49 =
  30. 30.5 × 99 =
  31. 31.4 × 98 =
  32. 32.4 × 98 =
  33. 33.14 × 49 =
  34. 34.8 × 98 =
  35. 35.13 × 19 =
  36. 36.10 × 98 =
  37. 37.4 × 19 =
  38. 38.14 × 49 =
  39. 39.10 × 49 =
  40. 40.14 × 9 =

Answer key

  1. 54
  2. 90
  3. 209
  4. 152
  5. 3038
  6. 3136
  7. 594
  8. 392
  9. 135
  10. 76
  11. 3626
  12. 54
  13. 686
  14. 245
  15. 108
  16. 1089
  17. 980
  18. 406
  19. 406
  20. 2970
  21. 3861
  22. 190
  23. 3038
  24. 171
  25. 108
  26. 588
  27. 133
  28. 3234
  29. 196
  30. 495
  31. 392
  32. 392
  33. 686
  34. 784
  35. 247
  36. 980
  37. 76
  38. 686
  39. 490
  40. 126

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