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Multiply by 15 Worksheet

Speed calculation lesson 8: × 15: ten plus half · Set 912 · 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. 1.25 × 15 =
  2. 2.20 × 15 =
  3. 3.61 × 15 =
  4. 4.34 × 15 =
  5. 5.24 × 15 =
  6. 6.35 × 15 =
  7. 7.15 × 15 =
  8. 8.24 × 15 =
  9. 9.12 × 15 =
  10. 10.41 × 15 =
  11. 11.46 × 15 =
  12. 12.16 × 15 =
  13. 13.19 × 15 =
  14. 14.32 × 15 =
  15. 15.34 × 15 =
  16. 16.19 × 15 =
  17. 17.44 × 15 =
  18. 18.63 × 15 =
  19. 19.12 × 15 =
  20. 20.28 × 15 =
  21. 21.52 × 15 =
  22. 22.10 × 15 =
  23. 23.26 × 15 =
  24. 24.37 × 15 =
  25. 25.62 × 15 =
  26. 26.62 × 15 =
  27. 27.17 × 15 =
  28. 28.49 × 15 =
  29. 29.10 × 15 =
  30. 30.38 × 15 =
  31. 31.48 × 15 =
  32. 32.15 × 15 =
  33. 33.30 × 15 =
  34. 34.13 × 15 =
  35. 35.15 × 15 =
  36. 36.10 × 15 =
  37. 37.19 × 15 =
  38. 38.58 × 15 =
  39. 39.51 × 15 =
  40. 40.7 × 15 =

Answer key

  1. 375
  2. 300
  3. 915
  4. 510
  5. 360
  6. 525
  7. 225
  8. 360
  9. 180
  10. 615
  11. 690
  12. 240
  13. 285
  14. 480
  15. 510
  16. 285
  17. 660
  18. 945
  19. 180
  20. 420
  21. 780
  22. 150
  23. 390
  24. 555
  25. 930
  26. 930
  27. 255
  28. 735
  29. 150
  30. 570
  31. 720
  32. 225
  33. 450
  34. 195
  35. 225
  36. 150
  37. 285
  38. 870
  39. 765
  40. 105

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