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Multiply by 15 Worksheet

Speed calculation lesson 8: × 15: ten plus half · Set 273 · 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. 1.48 × 15 =
  2. 2.26 × 15 =
  3. 3.19 × 15 =
  4. 4.45 × 15 =
  5. 5.34 × 15 =
  6. 6.30 × 15 =
  7. 7.60 × 15 =
  8. 8.33 × 15 =
  9. 9.60 × 15 =
  10. 10.27 × 15 =
  11. 11.10 × 15 =
  12. 12.29 × 15 =
  13. 13.16 × 15 =
  14. 14.15 × 15 =
  15. 15.55 × 15 =
  16. 16.48 × 15 =
  17. 17.60 × 15 =
  18. 18.34 × 15 =
  19. 19.35 × 15 =
  20. 20.62 × 15 =
  21. 21.35 × 15 =
  22. 22.17 × 15 =
  23. 23.18 × 15 =
  24. 24.55 × 15 =
  25. 25.49 × 15 =
  26. 26.48 × 15 =
  27. 27.23 × 15 =
  28. 28.20 × 15 =
  29. 29.17 × 15 =
  30. 30.21 × 15 =
  31. 31.19 × 15 =
  32. 32.18 × 15 =
  33. 33.22 × 15 =
  34. 34.11 × 15 =
  35. 35.28 × 15 =
  36. 36.41 × 15 =
  37. 37.50 × 15 =
  38. 38.60 × 15 =
  39. 39.5 × 15 =
  40. 40.61 × 15 =

Answer key

  1. 720
  2. 390
  3. 285
  4. 675
  5. 510
  6. 450
  7. 900
  8. 495
  9. 900
  10. 405
  11. 150
  12. 435
  13. 240
  14. 225
  15. 825
  16. 720
  17. 900
  18. 510
  19. 525
  20. 930
  21. 525
  22. 255
  23. 270
  24. 825
  25. 735
  26. 720
  27. 345
  28. 300
  29. 255
  30. 315
  31. 285
  32. 270
  33. 330
  34. 165
  35. 420
  36. 615
  37. 750
  38. 900
  39. 75
  40. 915

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