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Multiply by 15 Worksheet

Speed calculation lesson 8: × 15: ten plus half · Set 746 · 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. 1.29 × 15 =
  2. 2.32 × 15 =
  3. 3.16 × 15 =
  4. 4.11 × 15 =
  5. 5.24 × 15 =
  6. 6.44 × 15 =
  7. 7.34 × 15 =
  8. 8.39 × 15 =
  9. 9.51 × 15 =
  10. 10.4 × 15 =
  11. 11.49 × 15 =
  12. 12.6 × 15 =
  13. 13.41 × 15 =
  14. 14.12 × 15 =
  15. 15.32 × 15 =
  16. 16.61 × 15 =
  17. 17.28 × 15 =
  18. 18.35 × 15 =
  19. 19.12 × 15 =
  20. 20.11 × 15 =
  21. 21.31 × 15 =
  22. 22.18 × 15 =
  23. 23.8 × 15 =
  24. 24.63 × 15 =
  25. 25.10 × 15 =
  26. 26.25 × 15 =
  27. 27.55 × 15 =
  28. 28.38 × 15 =
  29. 29.39 × 15 =
  30. 30.6 × 15 =
  31. 31.10 × 15 =
  32. 32.30 × 15 =
  33. 33.50 × 15 =
  34. 34.46 × 15 =
  35. 35.49 × 15 =
  36. 36.18 × 15 =
  37. 37.50 × 15 =
  38. 38.37 × 15 =
  39. 39.5 × 15 =
  40. 40.54 × 15 =

Answer key

  1. 435
  2. 480
  3. 240
  4. 165
  5. 360
  6. 660
  7. 510
  8. 585
  9. 765
  10. 60
  11. 735
  12. 90
  13. 615
  14. 180
  15. 480
  16. 915
  17. 420
  18. 525
  19. 180
  20. 165
  21. 465
  22. 270
  23. 120
  24. 945
  25. 150
  26. 375
  27. 825
  28. 570
  29. 585
  30. 90
  31. 150
  32. 450
  33. 750
  34. 690
  35. 735
  36. 270
  37. 750
  38. 555
  39. 75
  40. 810

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