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Multiply by 15 Worksheet

Speed calculation lesson 8: × 15: ten plus half · Set 708 · 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. 1.20 × 15 =
  2. 2.16 × 15 =
  3. 3.10 × 15 =
  4. 4.36 × 15 =
  5. 5.40 × 15 =
  6. 6.32 × 15 =
  7. 7.58 × 15 =
  8. 8.57 × 15 =
  9. 9.22 × 15 =
  10. 10.23 × 15 =
  11. 11.57 × 15 =
  12. 12.39 × 15 =
  13. 13.37 × 15 =
  14. 14.50 × 15 =
  15. 15.34 × 15 =
  16. 16.11 × 15 =
  17. 17.9 × 15 =
  18. 18.34 × 15 =
  19. 19.58 × 15 =
  20. 20.15 × 15 =
  21. 21.21 × 15 =
  22. 22.37 × 15 =
  23. 23.53 × 15 =
  24. 24.23 × 15 =
  25. 25.7 × 15 =
  26. 26.5 × 15 =
  27. 27.45 × 15 =
  28. 28.4 × 15 =
  29. 29.34 × 15 =
  30. 30.52 × 15 =
  31. 31.4 × 15 =
  32. 32.63 × 15 =
  33. 33.56 × 15 =
  34. 34.35 × 15 =
  35. 35.51 × 15 =
  36. 36.13 × 15 =
  37. 37.31 × 15 =
  38. 38.30 × 15 =
  39. 39.34 × 15 =
  40. 40.59 × 15 =

Answer key

  1. 300
  2. 240
  3. 150
  4. 540
  5. 600
  6. 480
  7. 870
  8. 855
  9. 330
  10. 345
  11. 855
  12. 585
  13. 555
  14. 750
  15. 510
  16. 165
  17. 135
  18. 510
  19. 870
  20. 225
  21. 315
  22. 555
  23. 795
  24. 345
  25. 105
  26. 75
  27. 675
  28. 60
  29. 510
  30. 780
  31. 60
  32. 945
  33. 840
  34. 525
  35. 765
  36. 195
  37. 465
  38. 450
  39. 510
  40. 885

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