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Multiply by 15 Worksheet

Speed calculation lesson 8: × 15: ten plus half · Set 588 · 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. 1.30 × 15 =
  2. 2.52 × 15 =
  3. 3.11 × 15 =
  4. 4.8 × 15 =
  5. 5.12 × 15 =
  6. 6.9 × 15 =
  7. 7.36 × 15 =
  8. 8.40 × 15 =
  9. 9.49 × 15 =
  10. 10.13 × 15 =
  11. 11.23 × 15 =
  12. 12.12 × 15 =
  13. 13.52 × 15 =
  14. 14.33 × 15 =
  15. 15.42 × 15 =
  16. 16.45 × 15 =
  17. 17.56 × 15 =
  18. 18.38 × 15 =
  19. 19.11 × 15 =
  20. 20.48 × 15 =
  21. 21.33 × 15 =
  22. 22.11 × 15 =
  23. 23.50 × 15 =
  24. 24.21 × 15 =
  25. 25.8 × 15 =
  26. 26.57 × 15 =
  27. 27.61 × 15 =
  28. 28.4 × 15 =
  29. 29.42 × 15 =
  30. 30.29 × 15 =
  31. 31.33 × 15 =
  32. 32.44 × 15 =
  33. 33.6 × 15 =
  34. 34.52 × 15 =
  35. 35.8 × 15 =
  36. 36.20 × 15 =
  37. 37.16 × 15 =
  38. 38.50 × 15 =
  39. 39.10 × 15 =
  40. 40.55 × 15 =

Answer key

  1. 450
  2. 780
  3. 165
  4. 120
  5. 180
  6. 135
  7. 540
  8. 600
  9. 735
  10. 195
  11. 345
  12. 180
  13. 780
  14. 495
  15. 630
  16. 675
  17. 840
  18. 570
  19. 165
  20. 720
  21. 495
  22. 165
  23. 750
  24. 315
  25. 120
  26. 855
  27. 915
  28. 60
  29. 630
  30. 435
  31. 495
  32. 660
  33. 90
  34. 780
  35. 120
  36. 300
  37. 240
  38. 750
  39. 150
  40. 825

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