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Multiply by 15 Worksheet

Speed calculation lesson 8: × 15: ten plus half · Set 767 · 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. 1.28 × 15 =
  2. 2.57 × 15 =
  3. 3.52 × 15 =
  4. 4.24 × 15 =
  5. 5.5 × 15 =
  6. 6.48 × 15 =
  7. 7.38 × 15 =
  8. 8.28 × 15 =
  9. 9.40 × 15 =
  10. 10.54 × 15 =
  11. 11.24 × 15 =
  12. 12.7 × 15 =
  13. 13.50 × 15 =
  14. 14.8 × 15 =
  15. 15.16 × 15 =
  16. 16.52 × 15 =
  17. 17.58 × 15 =
  18. 18.20 × 15 =
  19. 19.49 × 15 =
  20. 20.8 × 15 =
  21. 21.21 × 15 =
  22. 22.4 × 15 =
  23. 23.34 × 15 =
  24. 24.56 × 15 =
  25. 25.18 × 15 =
  26. 26.9 × 15 =
  27. 27.41 × 15 =
  28. 28.38 × 15 =
  29. 29.18 × 15 =
  30. 30.42 × 15 =
  31. 31.29 × 15 =
  32. 32.59 × 15 =
  33. 33.35 × 15 =
  34. 34.43 × 15 =
  35. 35.43 × 15 =
  36. 36.18 × 15 =
  37. 37.11 × 15 =
  38. 38.62 × 15 =
  39. 39.61 × 15 =
  40. 40.51 × 15 =

Answer key

  1. 420
  2. 855
  3. 780
  4. 360
  5. 75
  6. 720
  7. 570
  8. 420
  9. 600
  10. 810
  11. 360
  12. 105
  13. 750
  14. 120
  15. 240
  16. 780
  17. 870
  18. 300
  19. 735
  20. 120
  21. 315
  22. 60
  23. 510
  24. 840
  25. 270
  26. 135
  27. 615
  28. 570
  29. 270
  30. 630
  31. 435
  32. 885
  33. 525
  34. 645
  35. 645
  36. 270
  37. 165
  38. 930
  39. 915
  40. 765

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