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Multiply by 15 Worksheet

Speed calculation lesson 8: × 15: ten plus half · Set 14 · 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. 1.13 × 15 =
  2. 2.13 × 15 =
  3. 3.14 × 15 =
  4. 4.11 × 15 =
  5. 5.28 × 15 =
  6. 6.64 × 15 =
  7. 7.43 × 15 =
  8. 8.20 × 15 =
  9. 9.57 × 15 =
  10. 10.8 × 15 =
  11. 11.62 × 15 =
  12. 12.13 × 15 =
  13. 13.39 × 15 =
  14. 14.36 × 15 =
  15. 15.60 × 15 =
  16. 16.8 × 15 =
  17. 17.4 × 15 =
  18. 18.13 × 15 =
  19. 19.16 × 15 =
  20. 20.19 × 15 =
  21. 21.22 × 15 =
  22. 22.46 × 15 =
  23. 23.21 × 15 =
  24. 24.52 × 15 =
  25. 25.5 × 15 =
  26. 26.56 × 15 =
  27. 27.50 × 15 =
  28. 28.22 × 15 =
  29. 29.22 × 15 =
  30. 30.24 × 15 =
  31. 31.57 × 15 =
  32. 32.9 × 15 =
  33. 33.9 × 15 =
  34. 34.26 × 15 =
  35. 35.10 × 15 =
  36. 36.32 × 15 =
  37. 37.12 × 15 =
  38. 38.14 × 15 =
  39. 39.19 × 15 =
  40. 40.63 × 15 =

Answer key

  1. 195
  2. 195
  3. 210
  4. 165
  5. 420
  6. 960
  7. 645
  8. 300
  9. 855
  10. 120
  11. 930
  12. 195
  13. 585
  14. 540
  15. 900
  16. 120
  17. 60
  18. 195
  19. 240
  20. 285
  21. 330
  22. 690
  23. 315
  24. 780
  25. 75
  26. 840
  27. 750
  28. 330
  29. 330
  30. 360
  31. 855
  32. 135
  33. 135
  34. 390
  35. 150
  36. 480
  37. 180
  38. 210
  39. 285
  40. 945

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