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Multiply by 15 Worksheet

Speed calculation lesson 8: × 15: ten plus half · Set 99 · 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. 2.51 × 15 =
  3. 3.38 × 15 =
  4. 4.16 × 15 =
  5. 5.43 × 15 =
  6. 6.23 × 15 =
  7. 7.35 × 15 =
  8. 8.8 × 15 =
  9. 9.42 × 15 =
  10. 10.36 × 15 =
  11. 11.14 × 15 =
  12. 12.44 × 15 =
  13. 13.29 × 15 =
  14. 14.52 × 15 =
  15. 15.8 × 15 =
  16. 16.7 × 15 =
  17. 17.35 × 15 =
  18. 18.6 × 15 =
  19. 19.59 × 15 =
  20. 20.52 × 15 =
  21. 21.31 × 15 =
  22. 22.32 × 15 =
  23. 23.26 × 15 =
  24. 24.33 × 15 =
  25. 25.41 × 15 =
  26. 26.46 × 15 =
  27. 27.60 × 15 =
  28. 28.60 × 15 =
  29. 29.36 × 15 =
  30. 30.21 × 15 =
  31. 31.31 × 15 =
  32. 32.60 × 15 =
  33. 33.40 × 15 =
  34. 34.23 × 15 =
  35. 35.39 × 15 =
  36. 36.24 × 15 =
  37. 37.30 × 15 =
  38. 38.21 × 15 =
  39. 39.5 × 15 =
  40. 40.40 × 15 =

Answer key

  1. 435
  2. 765
  3. 570
  4. 240
  5. 645
  6. 345
  7. 525
  8. 120
  9. 630
  10. 540
  11. 210
  12. 660
  13. 435
  14. 780
  15. 120
  16. 105
  17. 525
  18. 90
  19. 885
  20. 780
  21. 465
  22. 480
  23. 390
  24. 495
  25. 615
  26. 690
  27. 900
  28. 900
  29. 540
  30. 315
  31. 465
  32. 900
  33. 600
  34. 345
  35. 585
  36. 360
  37. 450
  38. 315
  39. 75
  40. 600

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