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Multiply by 15 Worksheet

Speed calculation lesson 8: × 15: ten plus half · Set 575 · 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. 2.46 × 15 =
  3. 3.30 × 15 =
  4. 4.47 × 15 =
  5. 5.44 × 15 =
  6. 6.10 × 15 =
  7. 7.38 × 15 =
  8. 8.20 × 15 =
  9. 9.27 × 15 =
  10. 10.37 × 15 =
  11. 11.31 × 15 =
  12. 12.46 × 15 =
  13. 13.53 × 15 =
  14. 14.18 × 15 =
  15. 15.55 × 15 =
  16. 16.16 × 15 =
  17. 17.50 × 15 =
  18. 18.57 × 15 =
  19. 19.56 × 15 =
  20. 20.64 × 15 =
  21. 21.43 × 15 =
  22. 22.58 × 15 =
  23. 23.45 × 15 =
  24. 24.38 × 15 =
  25. 25.41 × 15 =
  26. 26.19 × 15 =
  27. 27.32 × 15 =
  28. 28.12 × 15 =
  29. 29.49 × 15 =
  30. 30.15 × 15 =
  31. 31.9 × 15 =
  32. 32.63 × 15 =
  33. 33.42 × 15 =
  34. 34.9 × 15 =
  35. 35.10 × 15 =
  36. 36.34 × 15 =
  37. 37.15 × 15 =
  38. 38.48 × 15 =
  39. 39.19 × 15 =
  40. 40.58 × 15 =

Answer key

  1. 540
  2. 690
  3. 450
  4. 705
  5. 660
  6. 150
  7. 570
  8. 300
  9. 405
  10. 555
  11. 465
  12. 690
  13. 795
  14. 270
  15. 825
  16. 240
  17. 750
  18. 855
  19. 840
  20. 960
  21. 645
  22. 870
  23. 675
  24. 570
  25. 615
  26. 285
  27. 480
  28. 180
  29. 735
  30. 225
  31. 135
  32. 945
  33. 630
  34. 135
  35. 150
  36. 510
  37. 225
  38. 720
  39. 285
  40. 870

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