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Multiply by 15 Worksheet

Speed calculation lesson 8: × 15: ten plus half · Set 244 · 40 questions
TalentJR

The fast method (Ten and half again): Multiply by 10: 46 → 460. Halve that answer: half of 460 is 230. Add the two: 460 + 230 = 690.

NameDateTime takenScore ___ / 40
  1. 1.21 × 15 =
  2. 2.61 × 15 =
  3. 3.45 × 15 =
  4. 4.42 × 15 =
  5. 5.56 × 15 =
  6. 6.50 × 15 =
  7. 7.41 × 15 =
  8. 8.29 × 15 =
  9. 9.64 × 15 =
  10. 10.5 × 15 =
  11. 11.52 × 15 =
  12. 12.17 × 15 =
  13. 13.7 × 15 =
  14. 14.63 × 15 =
  15. 15.12 × 15 =
  16. 16.31 × 15 =
  17. 17.15 × 15 =
  18. 18.41 × 15 =
  19. 19.34 × 15 =
  20. 20.11 × 15 =
  21. 21.26 × 15 =
  22. 22.61 × 15 =
  23. 23.56 × 15 =
  24. 24.8 × 15 =
  25. 25.31 × 15 =
  26. 26.27 × 15 =
  27. 27.11 × 15 =
  28. 28.56 × 15 =
  29. 29.29 × 15 =
  30. 30.64 × 15 =
  31. 31.25 × 15 =
  32. 32.55 × 15 =
  33. 33.59 × 15 =
  34. 34.49 × 15 =
  35. 35.54 × 15 =
  36. 36.51 × 15 =
  37. 37.24 × 15 =
  38. 38.12 × 15 =
  39. 39.42 × 15 =
  40. 40.27 × 15 =

Answer key

  1. 315
  2. 915
  3. 675
  4. 630
  5. 840
  6. 750
  7. 615
  8. 435
  9. 960
  10. 75
  11. 780
  12. 255
  13. 105
  14. 945
  15. 180
  16. 465
  17. 225
  18. 615
  19. 510
  20. 165
  21. 390
  22. 915
  23. 840
  24. 120
  25. 465
  26. 405
  27. 165
  28. 840
  29. 435
  30. 960
  31. 375
  32. 825
  33. 885
  34. 735
  35. 810
  36. 765
  37. 360
  38. 180
  39. 630
  40. 405

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