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Multiply by 15 Worksheet

Speed calculation lesson 8: × 15: ten plus half · Set 960 · 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. 1.41 × 15 =
  2. 2.7 × 15 =
  3. 3.43 × 15 =
  4. 4.21 × 15 =
  5. 5.27 × 15 =
  6. 6.10 × 15 =
  7. 7.41 × 15 =
  8. 8.43 × 15 =
  9. 9.41 × 15 =
  10. 10.32 × 15 =
  11. 11.11 × 15 =
  12. 12.30 × 15 =
  13. 13.8 × 15 =
  14. 14.58 × 15 =
  15. 15.59 × 15 =
  16. 16.22 × 15 =
  17. 17.16 × 15 =
  18. 18.45 × 15 =
  19. 19.10 × 15 =
  20. 20.6 × 15 =
  21. 21.5 × 15 =
  22. 22.60 × 15 =
  23. 23.6 × 15 =
  24. 24.63 × 15 =
  25. 25.24 × 15 =
  26. 26.29 × 15 =
  27. 27.14 × 15 =
  28. 28.17 × 15 =
  29. 29.34 × 15 =
  30. 30.31 × 15 =
  31. 31.9 × 15 =
  32. 32.48 × 15 =
  33. 33.24 × 15 =
  34. 34.17 × 15 =
  35. 35.17 × 15 =
  36. 36.58 × 15 =
  37. 37.42 × 15 =
  38. 38.57 × 15 =
  39. 39.26 × 15 =
  40. 40.58 × 15 =

Answer key

  1. 615
  2. 105
  3. 645
  4. 315
  5. 405
  6. 150
  7. 615
  8. 645
  9. 615
  10. 480
  11. 165
  12. 450
  13. 120
  14. 870
  15. 885
  16. 330
  17. 240
  18. 675
  19. 150
  20. 90
  21. 75
  22. 900
  23. 90
  24. 945
  25. 360
  26. 435
  27. 210
  28. 255
  29. 510
  30. 465
  31. 135
  32. 720
  33. 360
  34. 255
  35. 255
  36. 870
  37. 630
  38. 855
  39. 390
  40. 870

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