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Multiply by 15 Worksheet

Speed calculation lesson 8: × 15: ten plus half · Set 300 · 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. 1.44 × 15 =
  2. 2.44 × 15 =
  3. 3.36 × 15 =
  4. 4.43 × 15 =
  5. 5.39 × 15 =
  6. 6.30 × 15 =
  7. 7.54 × 15 =
  8. 8.27 × 15 =
  9. 9.17 × 15 =
  10. 10.41 × 15 =
  11. 11.12 × 15 =
  12. 12.27 × 15 =
  13. 13.25 × 15 =
  14. 14.45 × 15 =
  15. 15.16 × 15 =
  16. 16.30 × 15 =
  17. 17.15 × 15 =
  18. 18.51 × 15 =
  19. 19.23 × 15 =
  20. 20.57 × 15 =
  21. 21.20 × 15 =
  22. 22.52 × 15 =
  23. 23.34 × 15 =
  24. 24.19 × 15 =
  25. 25.62 × 15 =
  26. 26.42 × 15 =
  27. 27.27 × 15 =
  28. 28.30 × 15 =
  29. 29.6 × 15 =
  30. 30.5 × 15 =
  31. 31.29 × 15 =
  32. 32.56 × 15 =
  33. 33.46 × 15 =
  34. 34.21 × 15 =
  35. 35.36 × 15 =
  36. 36.12 × 15 =
  37. 37.5 × 15 =
  38. 38.59 × 15 =
  39. 39.18 × 15 =
  40. 40.55 × 15 =

Answer key

  1. 660
  2. 660
  3. 540
  4. 645
  5. 585
  6. 450
  7. 810
  8. 405
  9. 255
  10. 615
  11. 180
  12. 405
  13. 375
  14. 675
  15. 240
  16. 450
  17. 225
  18. 765
  19. 345
  20. 855
  21. 300
  22. 780
  23. 510
  24. 285
  25. 930
  26. 630
  27. 405
  28. 450
  29. 90
  30. 75
  31. 435
  32. 840
  33. 690
  34. 315
  35. 540
  36. 180
  37. 75
  38. 885
  39. 270
  40. 825

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