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Multiply by 15 Worksheet

Speed calculation lesson 8: × 15: ten plus half · Set 882 · 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. 1.36 × 15 =
  2. 2.40 × 15 =
  3. 3.56 × 15 =
  4. 4.57 × 15 =
  5. 5.7 × 15 =
  6. 6.57 × 15 =
  7. 7.11 × 15 =
  8. 8.15 × 15 =
  9. 9.30 × 15 =
  10. 10.53 × 15 =
  11. 11.32 × 15 =
  12. 12.48 × 15 =
  13. 13.16 × 15 =
  14. 14.37 × 15 =
  15. 15.29 × 15 =
  16. 16.44 × 15 =
  17. 17.26 × 15 =
  18. 18.62 × 15 =
  19. 19.19 × 15 =
  20. 20.12 × 15 =
  21. 21.46 × 15 =
  22. 22.38 × 15 =
  23. 23.17 × 15 =
  24. 24.7 × 15 =
  25. 25.45 × 15 =
  26. 26.16 × 15 =
  27. 27.64 × 15 =
  28. 28.22 × 15 =
  29. 29.53 × 15 =
  30. 30.38 × 15 =
  31. 31.39 × 15 =
  32. 32.45 × 15 =
  33. 33.9 × 15 =
  34. 34.62 × 15 =
  35. 35.36 × 15 =
  36. 36.47 × 15 =
  37. 37.37 × 15 =
  38. 38.41 × 15 =
  39. 39.27 × 15 =
  40. 40.54 × 15 =

Answer key

  1. 540
  2. 600
  3. 840
  4. 855
  5. 105
  6. 855
  7. 165
  8. 225
  9. 450
  10. 795
  11. 480
  12. 720
  13. 240
  14. 555
  15. 435
  16. 660
  17. 390
  18. 930
  19. 285
  20. 180
  21. 690
  22. 570
  23. 255
  24. 105
  25. 675
  26. 240
  27. 960
  28. 330
  29. 795
  30. 570
  31. 585
  32. 675
  33. 135
  34. 930
  35. 540
  36. 705
  37. 555
  38. 615
  39. 405
  40. 810

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