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Multiply by 15 Worksheet

Speed calculation lesson 8: × 15: ten plus half · Set 816 · 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. 1.11 × 15 =
  2. 2.13 × 15 =
  3. 3.22 × 15 =
  4. 4.32 × 15 =
  5. 5.8 × 15 =
  6. 6.45 × 15 =
  7. 7.29 × 15 =
  8. 8.6 × 15 =
  9. 9.30 × 15 =
  10. 10.46 × 15 =
  11. 11.26 × 15 =
  12. 12.64 × 15 =
  13. 13.57 × 15 =
  14. 14.18 × 15 =
  15. 15.24 × 15 =
  16. 16.11 × 15 =
  17. 17.13 × 15 =
  18. 18.34 × 15 =
  19. 19.37 × 15 =
  20. 20.53 × 15 =
  21. 21.7 × 15 =
  22. 22.59 × 15 =
  23. 23.64 × 15 =
  24. 24.38 × 15 =
  25. 25.5 × 15 =
  26. 26.18 × 15 =
  27. 27.45 × 15 =
  28. 28.28 × 15 =
  29. 29.29 × 15 =
  30. 30.35 × 15 =
  31. 31.38 × 15 =
  32. 32.50 × 15 =
  33. 33.14 × 15 =
  34. 34.28 × 15 =
  35. 35.44 × 15 =
  36. 36.54 × 15 =
  37. 37.16 × 15 =
  38. 38.57 × 15 =
  39. 39.26 × 15 =
  40. 40.14 × 15 =

Answer key

  1. 165
  2. 195
  3. 330
  4. 480
  5. 120
  6. 675
  7. 435
  8. 90
  9. 450
  10. 690
  11. 390
  12. 960
  13. 855
  14. 270
  15. 360
  16. 165
  17. 195
  18. 510
  19. 555
  20. 795
  21. 105
  22. 885
  23. 960
  24. 570
  25. 75
  26. 270
  27. 675
  28. 420
  29. 435
  30. 525
  31. 570
  32. 750
  33. 210
  34. 420
  35. 660
  36. 810
  37. 240
  38. 855
  39. 390
  40. 210

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