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Multiply by 15 Worksheet

Speed calculation lesson 8: × 15: ten plus half · Set 101 · 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. 1.14 × 15 =
  2. 2.4 × 15 =
  3. 3.43 × 15 =
  4. 4.38 × 15 =
  5. 5.26 × 15 =
  6. 6.18 × 15 =
  7. 7.53 × 15 =
  8. 8.22 × 15 =
  9. 9.49 × 15 =
  10. 10.50 × 15 =
  11. 11.27 × 15 =
  12. 12.26 × 15 =
  13. 13.15 × 15 =
  14. 14.11 × 15 =
  15. 15.36 × 15 =
  16. 16.51 × 15 =
  17. 17.61 × 15 =
  18. 18.49 × 15 =
  19. 19.4 × 15 =
  20. 20.6 × 15 =
  21. 21.28 × 15 =
  22. 22.29 × 15 =
  23. 23.8 × 15 =
  24. 24.16 × 15 =
  25. 25.41 × 15 =
  26. 26.60 × 15 =
  27. 27.15 × 15 =
  28. 28.25 × 15 =
  29. 29.36 × 15 =
  30. 30.20 × 15 =
  31. 31.56 × 15 =
  32. 32.14 × 15 =
  33. 33.12 × 15 =
  34. 34.8 × 15 =
  35. 35.6 × 15 =
  36. 36.36 × 15 =
  37. 37.42 × 15 =
  38. 38.52 × 15 =
  39. 39.9 × 15 =
  40. 40.41 × 15 =

Answer key

  1. 210
  2. 60
  3. 645
  4. 570
  5. 390
  6. 270
  7. 795
  8. 330
  9. 735
  10. 750
  11. 405
  12. 390
  13. 225
  14. 165
  15. 540
  16. 765
  17. 915
  18. 735
  19. 60
  20. 90
  21. 420
  22. 435
  23. 120
  24. 240
  25. 615
  26. 900
  27. 225
  28. 375
  29. 540
  30. 300
  31. 840
  32. 210
  33. 180
  34. 120
  35. 90
  36. 540
  37. 630
  38. 780
  39. 135
  40. 615

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