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Multiply by 15 Worksheet

Speed calculation lesson 8: × 15: ten plus half · Set 349 · 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. 1.52 × 15 =
  2. 2.21 × 15 =
  3. 3.49 × 15 =
  4. 4.44 × 15 =
  5. 5.34 × 15 =
  6. 6.14 × 15 =
  7. 7.10 × 15 =
  8. 8.15 × 15 =
  9. 9.61 × 15 =
  10. 10.54 × 15 =
  11. 11.54 × 15 =
  12. 12.59 × 15 =
  13. 13.41 × 15 =
  14. 14.41 × 15 =
  15. 15.32 × 15 =
  16. 16.31 × 15 =
  17. 17.31 × 15 =
  18. 18.16 × 15 =
  19. 19.18 × 15 =
  20. 20.7 × 15 =
  21. 21.7 × 15 =
  22. 22.11 × 15 =
  23. 23.9 × 15 =
  24. 24.7 × 15 =
  25. 25.48 × 15 =
  26. 26.29 × 15 =
  27. 27.6 × 15 =
  28. 28.62 × 15 =
  29. 29.34 × 15 =
  30. 30.24 × 15 =
  31. 31.6 × 15 =
  32. 32.53 × 15 =
  33. 33.20 × 15 =
  34. 34.41 × 15 =
  35. 35.6 × 15 =
  36. 36.64 × 15 =
  37. 37.48 × 15 =
  38. 38.42 × 15 =
  39. 39.6 × 15 =
  40. 40.39 × 15 =

Answer key

  1. 780
  2. 315
  3. 735
  4. 660
  5. 510
  6. 210
  7. 150
  8. 225
  9. 915
  10. 810
  11. 810
  12. 885
  13. 615
  14. 615
  15. 480
  16. 465
  17. 465
  18. 240
  19. 270
  20. 105
  21. 105
  22. 165
  23. 135
  24. 105
  25. 720
  26. 435
  27. 90
  28. 930
  29. 510
  30. 360
  31. 90
  32. 795
  33. 300
  34. 615
  35. 90
  36. 960
  37. 720
  38. 630
  39. 90
  40. 585

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