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Multiply by 15 Worksheet

Speed calculation lesson 8: × 15: ten plus half · Set 486 · 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. 1.21 × 15 =
  2. 2.35 × 15 =
  3. 3.35 × 15 =
  4. 4.34 × 15 =
  5. 5.22 × 15 =
  6. 6.40 × 15 =
  7. 7.53 × 15 =
  8. 8.51 × 15 =
  9. 9.4 × 15 =
  10. 10.8 × 15 =
  11. 11.17 × 15 =
  12. 12.40 × 15 =
  13. 13.46 × 15 =
  14. 14.57 × 15 =
  15. 15.12 × 15 =
  16. 16.17 × 15 =
  17. 17.30 × 15 =
  18. 18.11 × 15 =
  19. 19.25 × 15 =
  20. 20.20 × 15 =
  21. 21.32 × 15 =
  22. 22.37 × 15 =
  23. 23.38 × 15 =
  24. 24.32 × 15 =
  25. 25.15 × 15 =
  26. 26.38 × 15 =
  27. 27.7 × 15 =
  28. 28.16 × 15 =
  29. 29.55 × 15 =
  30. 30.26 × 15 =
  31. 31.35 × 15 =
  32. 32.62 × 15 =
  33. 33.6 × 15 =
  34. 34.19 × 15 =
  35. 35.19 × 15 =
  36. 36.22 × 15 =
  37. 37.52 × 15 =
  38. 38.21 × 15 =
  39. 39.8 × 15 =
  40. 40.54 × 15 =

Answer key

  1. 315
  2. 525
  3. 525
  4. 510
  5. 330
  6. 600
  7. 795
  8. 765
  9. 60
  10. 120
  11. 255
  12. 600
  13. 690
  14. 855
  15. 180
  16. 255
  17. 450
  18. 165
  19. 375
  20. 300
  21. 480
  22. 555
  23. 570
  24. 480
  25. 225
  26. 570
  27. 105
  28. 240
  29. 825
  30. 390
  31. 525
  32. 930
  33. 90
  34. 285
  35. 285
  36. 330
  37. 780
  38. 315
  39. 120
  40. 810

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