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Multiply by 15 Worksheet

Speed calculation lesson 8: × 15: ten plus half · Set 516 · 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. 1.5 × 15 =
  2. 2.14 × 15 =
  3. 3.33 × 15 =
  4. 4.8 × 15 =
  5. 5.48 × 15 =
  6. 6.33 × 15 =
  7. 7.21 × 15 =
  8. 8.45 × 15 =
  9. 9.46 × 15 =
  10. 10.57 × 15 =
  11. 11.33 × 15 =
  12. 12.61 × 15 =
  13. 13.9 × 15 =
  14. 14.8 × 15 =
  15. 15.29 × 15 =
  16. 16.16 × 15 =
  17. 17.61 × 15 =
  18. 18.64 × 15 =
  19. 19.9 × 15 =
  20. 20.59 × 15 =
  21. 21.25 × 15 =
  22. 22.40 × 15 =
  23. 23.62 × 15 =
  24. 24.26 × 15 =
  25. 25.58 × 15 =
  26. 26.41 × 15 =
  27. 27.27 × 15 =
  28. 28.50 × 15 =
  29. 29.37 × 15 =
  30. 30.24 × 15 =
  31. 31.38 × 15 =
  32. 32.44 × 15 =
  33. 33.20 × 15 =
  34. 34.20 × 15 =
  35. 35.55 × 15 =
  36. 36.45 × 15 =
  37. 37.43 × 15 =
  38. 38.33 × 15 =
  39. 39.41 × 15 =
  40. 40.8 × 15 =

Answer key

  1. 75
  2. 210
  3. 495
  4. 120
  5. 720
  6. 495
  7. 315
  8. 675
  9. 690
  10. 855
  11. 495
  12. 915
  13. 135
  14. 120
  15. 435
  16. 240
  17. 915
  18. 960
  19. 135
  20. 885
  21. 375
  22. 600
  23. 930
  24. 390
  25. 870
  26. 615
  27. 405
  28. 750
  29. 555
  30. 360
  31. 570
  32. 660
  33. 300
  34. 300
  35. 825
  36. 675
  37. 645
  38. 495
  39. 615
  40. 120

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