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Multiply by 15 Worksheet

Speed calculation lesson 8: × 15: ten plus half · Set 307 · 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. 1.37 × 15 =
  2. 2.58 × 15 =
  3. 3.26 × 15 =
  4. 4.39 × 15 =
  5. 5.14 × 15 =
  6. 6.28 × 15 =
  7. 7.16 × 15 =
  8. 8.58 × 15 =
  9. 9.58 × 15 =
  10. 10.16 × 15 =
  11. 11.58 × 15 =
  12. 12.49 × 15 =
  13. 13.61 × 15 =
  14. 14.38 × 15 =
  15. 15.35 × 15 =
  16. 16.55 × 15 =
  17. 17.25 × 15 =
  18. 18.25 × 15 =
  19. 19.51 × 15 =
  20. 20.37 × 15 =
  21. 21.35 × 15 =
  22. 22.59 × 15 =
  23. 23.60 × 15 =
  24. 24.40 × 15 =
  25. 25.34 × 15 =
  26. 26.29 × 15 =
  27. 27.63 × 15 =
  28. 28.41 × 15 =
  29. 29.56 × 15 =
  30. 30.54 × 15 =
  31. 31.8 × 15 =
  32. 32.14 × 15 =
  33. 33.58 × 15 =
  34. 34.58 × 15 =
  35. 35.4 × 15 =
  36. 36.34 × 15 =
  37. 37.5 × 15 =
  38. 38.12 × 15 =
  39. 39.11 × 15 =
  40. 40.16 × 15 =

Answer key

  1. 555
  2. 870
  3. 390
  4. 585
  5. 210
  6. 420
  7. 240
  8. 870
  9. 870
  10. 240
  11. 870
  12. 735
  13. 915
  14. 570
  15. 525
  16. 825
  17. 375
  18. 375
  19. 765
  20. 555
  21. 525
  22. 885
  23. 900
  24. 600
  25. 510
  26. 435
  27. 945
  28. 615
  29. 840
  30. 810
  31. 120
  32. 210
  33. 870
  34. 870
  35. 60
  36. 510
  37. 75
  38. 180
  39. 165
  40. 240

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