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Multiply by 15 Worksheet

Speed calculation lesson 8: × 15: ten plus half · Set 562 · 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. 1.38 × 15 =
  2. 2.54 × 15 =
  3. 3.54 × 15 =
  4. 4.43 × 15 =
  5. 5.47 × 15 =
  6. 6.4 × 15 =
  7. 7.17 × 15 =
  8. 8.18 × 15 =
  9. 9.39 × 15 =
  10. 10.45 × 15 =
  11. 11.60 × 15 =
  12. 12.35 × 15 =
  13. 13.22 × 15 =
  14. 14.10 × 15 =
  15. 15.59 × 15 =
  16. 16.18 × 15 =
  17. 17.22 × 15 =
  18. 18.29 × 15 =
  19. 19.23 × 15 =
  20. 20.61 × 15 =
  21. 21.37 × 15 =
  22. 22.8 × 15 =
  23. 23.27 × 15 =
  24. 24.38 × 15 =
  25. 25.56 × 15 =
  26. 26.20 × 15 =
  27. 27.36 × 15 =
  28. 28.34 × 15 =
  29. 29.28 × 15 =
  30. 30.56 × 15 =
  31. 31.41 × 15 =
  32. 32.44 × 15 =
  33. 33.30 × 15 =
  34. 34.52 × 15 =
  35. 35.27 × 15 =
  36. 36.44 × 15 =
  37. 37.22 × 15 =
  38. 38.16 × 15 =
  39. 39.64 × 15 =
  40. 40.43 × 15 =

Answer key

  1. 570
  2. 810
  3. 810
  4. 645
  5. 705
  6. 60
  7. 255
  8. 270
  9. 585
  10. 675
  11. 900
  12. 525
  13. 330
  14. 150
  15. 885
  16. 270
  17. 330
  18. 435
  19. 345
  20. 915
  21. 555
  22. 120
  23. 405
  24. 570
  25. 840
  26. 300
  27. 540
  28. 510
  29. 420
  30. 840
  31. 615
  32. 660
  33. 450
  34. 780
  35. 405
  36. 660
  37. 330
  38. 240
  39. 960
  40. 645

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