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Multiply by 15 Worksheet

Speed calculation lesson 8: × 15: ten plus half · Set 935 · 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. 1.30 × 15 =
  2. 2.38 × 15 =
  3. 3.49 × 15 =
  4. 4.38 × 15 =
  5. 5.55 × 15 =
  6. 6.38 × 15 =
  7. 7.9 × 15 =
  8. 8.64 × 15 =
  9. 9.50 × 15 =
  10. 10.37 × 15 =
  11. 11.59 × 15 =
  12. 12.32 × 15 =
  13. 13.38 × 15 =
  14. 14.4 × 15 =
  15. 15.41 × 15 =
  16. 16.49 × 15 =
  17. 17.18 × 15 =
  18. 18.42 × 15 =
  19. 19.16 × 15 =
  20. 20.14 × 15 =
  21. 21.32 × 15 =
  22. 22.51 × 15 =
  23. 23.63 × 15 =
  24. 24.56 × 15 =
  25. 25.41 × 15 =
  26. 26.52 × 15 =
  27. 27.53 × 15 =
  28. 28.25 × 15 =
  29. 29.16 × 15 =
  30. 30.18 × 15 =
  31. 31.38 × 15 =
  32. 32.25 × 15 =
  33. 33.19 × 15 =
  34. 34.14 × 15 =
  35. 35.8 × 15 =
  36. 36.38 × 15 =
  37. 37.40 × 15 =
  38. 38.57 × 15 =
  39. 39.55 × 15 =
  40. 40.60 × 15 =

Answer key

  1. 450
  2. 570
  3. 735
  4. 570
  5. 825
  6. 570
  7. 135
  8. 960
  9. 750
  10. 555
  11. 885
  12. 480
  13. 570
  14. 60
  15. 615
  16. 735
  17. 270
  18. 630
  19. 240
  20. 210
  21. 480
  22. 765
  23. 945
  24. 840
  25. 615
  26. 780
  27. 795
  28. 375
  29. 240
  30. 270
  31. 570
  32. 375
  33. 285
  34. 210
  35. 120
  36. 570
  37. 600
  38. 855
  39. 825
  40. 900

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