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Multiply by 15 Worksheet

Speed calculation lesson 8: × 15: ten plus half · Set 359 · 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. 1.21 × 15 =
  2. 2.8 × 15 =
  3. 3.10 × 15 =
  4. 4.4 × 15 =
  5. 5.21 × 15 =
  6. 6.57 × 15 =
  7. 7.25 × 15 =
  8. 8.17 × 15 =
  9. 9.49 × 15 =
  10. 10.9 × 15 =
  11. 11.36 × 15 =
  12. 12.41 × 15 =
  13. 13.12 × 15 =
  14. 14.52 × 15 =
  15. 15.61 × 15 =
  16. 16.44 × 15 =
  17. 17.26 × 15 =
  18. 18.41 × 15 =
  19. 19.22 × 15 =
  20. 20.51 × 15 =
  21. 21.47 × 15 =
  22. 22.50 × 15 =
  23. 23.54 × 15 =
  24. 24.37 × 15 =
  25. 25.35 × 15 =
  26. 26.36 × 15 =
  27. 27.57 × 15 =
  28. 28.4 × 15 =
  29. 29.7 × 15 =
  30. 30.18 × 15 =
  31. 31.24 × 15 =
  32. 32.23 × 15 =
  33. 33.36 × 15 =
  34. 34.51 × 15 =
  35. 35.30 × 15 =
  36. 36.24 × 15 =
  37. 37.62 × 15 =
  38. 38.44 × 15 =
  39. 39.47 × 15 =
  40. 40.12 × 15 =

Answer key

  1. 315
  2. 120
  3. 150
  4. 60
  5. 315
  6. 855
  7. 375
  8. 255
  9. 735
  10. 135
  11. 540
  12. 615
  13. 180
  14. 780
  15. 915
  16. 660
  17. 390
  18. 615
  19. 330
  20. 765
  21. 705
  22. 750
  23. 810
  24. 555
  25. 525
  26. 540
  27. 855
  28. 60
  29. 105
  30. 270
  31. 360
  32. 345
  33. 540
  34. 765
  35. 450
  36. 360
  37. 930
  38. 660
  39. 705
  40. 180

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