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Multiply by 15 Worksheet

Speed calculation lesson 8: × 15: ten plus half · Set 76 · 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. 1.22 × 15 =
  2. 2.38 × 15 =
  3. 3.19 × 15 =
  4. 4.41 × 15 =
  5. 5.44 × 15 =
  6. 6.41 × 15 =
  7. 7.40 × 15 =
  8. 8.35 × 15 =
  9. 9.49 × 15 =
  10. 10.29 × 15 =
  11. 11.60 × 15 =
  12. 12.19 × 15 =
  13. 13.7 × 15 =
  14. 14.33 × 15 =
  15. 15.44 × 15 =
  16. 16.13 × 15 =
  17. 17.60 × 15 =
  18. 18.30 × 15 =
  19. 19.51 × 15 =
  20. 20.30 × 15 =
  21. 21.7 × 15 =
  22. 22.52 × 15 =
  23. 23.5 × 15 =
  24. 24.17 × 15 =
  25. 25.56 × 15 =
  26. 26.23 × 15 =
  27. 27.44 × 15 =
  28. 28.31 × 15 =
  29. 29.30 × 15 =
  30. 30.54 × 15 =
  31. 31.58 × 15 =
  32. 32.62 × 15 =
  33. 33.43 × 15 =
  34. 34.62 × 15 =
  35. 35.26 × 15 =
  36. 36.35 × 15 =
  37. 37.42 × 15 =
  38. 38.5 × 15 =
  39. 39.4 × 15 =
  40. 40.31 × 15 =

Answer key

  1. 330
  2. 570
  3. 285
  4. 615
  5. 660
  6. 615
  7. 600
  8. 525
  9. 735
  10. 435
  11. 900
  12. 285
  13. 105
  14. 495
  15. 660
  16. 195
  17. 900
  18. 450
  19. 765
  20. 450
  21. 105
  22. 780
  23. 75
  24. 255
  25. 840
  26. 345
  27. 660
  28. 465
  29. 450
  30. 810
  31. 870
  32. 930
  33. 645
  34. 930
  35. 390
  36. 525
  37. 630
  38. 75
  39. 60
  40. 465

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