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Multiply by 15 Worksheet

Speed calculation lesson 8: × 15: ten plus half · Set 186 · 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. 1.59 × 15 =
  2. 2.36 × 15 =
  3. 3.20 × 15 =
  4. 4.62 × 15 =
  5. 5.26 × 15 =
  6. 6.61 × 15 =
  7. 7.53 × 15 =
  8. 8.57 × 15 =
  9. 9.12 × 15 =
  10. 10.24 × 15 =
  11. 11.54 × 15 =
  12. 12.15 × 15 =
  13. 13.18 × 15 =
  14. 14.26 × 15 =
  15. 15.19 × 15 =
  16. 16.43 × 15 =
  17. 17.52 × 15 =
  18. 18.60 × 15 =
  19. 19.45 × 15 =
  20. 20.63 × 15 =
  21. 21.12 × 15 =
  22. 22.11 × 15 =
  23. 23.52 × 15 =
  24. 24.7 × 15 =
  25. 25.21 × 15 =
  26. 26.44 × 15 =
  27. 27.31 × 15 =
  28. 28.33 × 15 =
  29. 29.15 × 15 =
  30. 30.61 × 15 =
  31. 31.34 × 15 =
  32. 32.31 × 15 =
  33. 33.8 × 15 =
  34. 34.13 × 15 =
  35. 35.21 × 15 =
  36. 36.24 × 15 =
  37. 37.32 × 15 =
  38. 38.26 × 15 =
  39. 39.4 × 15 =
  40. 40.12 × 15 =

Answer key

  1. 885
  2. 540
  3. 300
  4. 930
  5. 390
  6. 915
  7. 795
  8. 855
  9. 180
  10. 360
  11. 810
  12. 225
  13. 270
  14. 390
  15. 285
  16. 645
  17. 780
  18. 900
  19. 675
  20. 945
  21. 180
  22. 165
  23. 780
  24. 105
  25. 315
  26. 660
  27. 465
  28. 495
  29. 225
  30. 915
  31. 510
  32. 465
  33. 120
  34. 195
  35. 315
  36. 360
  37. 480
  38. 390
  39. 60
  40. 180

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