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Multiply by 15 Worksheet

Speed calculation lesson 8: × 15: ten plus half · Set 77 · 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. 1.5 × 15 =
  2. 2.20 × 15 =
  3. 3.4 × 15 =
  4. 4.43 × 15 =
  5. 5.8 × 15 =
  6. 6.20 × 15 =
  7. 7.36 × 15 =
  8. 8.59 × 15 =
  9. 9.11 × 15 =
  10. 10.37 × 15 =
  11. 11.63 × 15 =
  12. 12.6 × 15 =
  13. 13.47 × 15 =
  14. 14.37 × 15 =
  15. 15.38 × 15 =
  16. 16.59 × 15 =
  17. 17.10 × 15 =
  18. 18.48 × 15 =
  19. 19.38 × 15 =
  20. 20.46 × 15 =
  21. 21.26 × 15 =
  22. 22.48 × 15 =
  23. 23.7 × 15 =
  24. 24.18 × 15 =
  25. 25.46 × 15 =
  26. 26.54 × 15 =
  27. 27.21 × 15 =
  28. 28.30 × 15 =
  29. 29.13 × 15 =
  30. 30.8 × 15 =
  31. 31.57 × 15 =
  32. 32.11 × 15 =
  33. 33.32 × 15 =
  34. 34.12 × 15 =
  35. 35.16 × 15 =
  36. 36.17 × 15 =
  37. 37.19 × 15 =
  38. 38.53 × 15 =
  39. 39.21 × 15 =
  40. 40.42 × 15 =

Answer key

  1. 75
  2. 300
  3. 60
  4. 645
  5. 120
  6. 300
  7. 540
  8. 885
  9. 165
  10. 555
  11. 945
  12. 90
  13. 705
  14. 555
  15. 570
  16. 885
  17. 150
  18. 720
  19. 570
  20. 690
  21. 390
  22. 720
  23. 105
  24. 270
  25. 690
  26. 810
  27. 315
  28. 450
  29. 195
  30. 120
  31. 855
  32. 165
  33. 480
  34. 180
  35. 240
  36. 255
  37. 285
  38. 795
  39. 315
  40. 630

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