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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 861 · 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. 1.12 × 9 =
  2. 2.3 × 19 =
  3. 3.27 × 98 =
  4. 4.5 × 9 =
  5. 5.4 × 19 =
  6. 6.3 × 19 =
  7. 7.14 × 19 =
  8. 8.34 × 98 =
  9. 9.39 × 99 =
  10. 10.9 × 29 =
  11. 11.9 × 49 =
  12. 12.5 × 19 =
  13. 13.14 × 29 =
  14. 14.13 × 19 =
  15. 15.28 × 98 =
  16. 16.4 × 29 =
  17. 17.11 × 9 =
  18. 18.8 × 19 =
  19. 19.5 × 9 =
  20. 20.9 × 49 =
  21. 21.11 × 29 =
  22. 22.11 × 9 =
  23. 23.14 × 49 =
  24. 24.34 × 98 =
  25. 25.6 × 98 =
  26. 26.8 × 9 =
  27. 27.4 × 98 =
  28. 28.14 × 29 =
  29. 29.19 × 98 =
  30. 30.31 × 99 =
  31. 31.15 × 49 =
  32. 32.11 × 99 =
  33. 33.13 × 29 =
  34. 34.15 × 19 =
  35. 35.4 × 29 =
  36. 36.8 × 19 =
  37. 37.13 × 19 =
  38. 38.4 × 98 =
  39. 39.10 × 19 =
  40. 40.10 × 49 =

Answer key

  1. 108
  2. 57
  3. 2646
  4. 45
  5. 76
  6. 57
  7. 266
  8. 3332
  9. 3861
  10. 261
  11. 441
  12. 95
  13. 406
  14. 247
  15. 2744
  16. 116
  17. 99
  18. 152
  19. 45
  20. 441
  21. 319
  22. 99
  23. 686
  24. 3332
  25. 588
  26. 72
  27. 392
  28. 406
  29. 1862
  30. 3069
  31. 735
  32. 1089
  33. 377
  34. 285
  35. 116
  36. 152
  37. 247
  38. 392
  39. 190
  40. 490

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