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Multiply by 15 Worksheet

Speed calculation lesson 8: × 15: ten plus half · Set 737 · 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. 1.7 × 15 =
  2. 2.10 × 15 =
  3. 3.23 × 15 =
  4. 4.12 × 15 =
  5. 5.54 × 15 =
  6. 6.42 × 15 =
  7. 7.25 × 15 =
  8. 8.44 × 15 =
  9. 9.59 × 15 =
  10. 10.36 × 15 =
  11. 11.8 × 15 =
  12. 12.63 × 15 =
  13. 13.64 × 15 =
  14. 14.24 × 15 =
  15. 15.57 × 15 =
  16. 16.53 × 15 =
  17. 17.5 × 15 =
  18. 18.49 × 15 =
  19. 19.57 × 15 =
  20. 20.7 × 15 =
  21. 21.30 × 15 =
  22. 22.4 × 15 =
  23. 23.34 × 15 =
  24. 24.55 × 15 =
  25. 25.40 × 15 =
  26. 26.15 × 15 =
  27. 27.17 × 15 =
  28. 28.16 × 15 =
  29. 29.4 × 15 =
  30. 30.7 × 15 =
  31. 31.38 × 15 =
  32. 32.59 × 15 =
  33. 33.37 × 15 =
  34. 34.32 × 15 =
  35. 35.42 × 15 =
  36. 36.26 × 15 =
  37. 37.60 × 15 =
  38. 38.20 × 15 =
  39. 39.63 × 15 =
  40. 40.45 × 15 =

Answer key

  1. 105
  2. 150
  3. 345
  4. 180
  5. 810
  6. 630
  7. 375
  8. 660
  9. 885
  10. 540
  11. 120
  12. 945
  13. 960
  14. 360
  15. 855
  16. 795
  17. 75
  18. 735
  19. 855
  20. 105
  21. 450
  22. 60
  23. 510
  24. 825
  25. 600
  26. 225
  27. 255
  28. 240
  29. 60
  30. 105
  31. 570
  32. 885
  33. 555
  34. 480
  35. 630
  36. 390
  37. 900
  38. 300
  39. 945
  40. 675

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