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Multiply by 15 Worksheet

Speed calculation lesson 8: × 15: ten plus half · Set 212 · 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. 1.63 × 15 =
  2. 2.6 × 15 =
  3. 3.57 × 15 =
  4. 4.60 × 15 =
  5. 5.45 × 15 =
  6. 6.13 × 15 =
  7. 7.41 × 15 =
  8. 8.31 × 15 =
  9. 9.60 × 15 =
  10. 10.57 × 15 =
  11. 11.36 × 15 =
  12. 12.62 × 15 =
  13. 13.9 × 15 =
  14. 14.18 × 15 =
  15. 15.15 × 15 =
  16. 16.10 × 15 =
  17. 17.39 × 15 =
  18. 18.20 × 15 =
  19. 19.48 × 15 =
  20. 20.40 × 15 =
  21. 21.10 × 15 =
  22. 22.20 × 15 =
  23. 23.7 × 15 =
  24. 24.14 × 15 =
  25. 25.18 × 15 =
  26. 26.18 × 15 =
  27. 27.63 × 15 =
  28. 28.20 × 15 =
  29. 29.36 × 15 =
  30. 30.12 × 15 =
  31. 31.56 × 15 =
  32. 32.11 × 15 =
  33. 33.12 × 15 =
  34. 34.44 × 15 =
  35. 35.13 × 15 =
  36. 36.53 × 15 =
  37. 37.7 × 15 =
  38. 38.62 × 15 =
  39. 39.23 × 15 =
  40. 40.59 × 15 =

Answer key

  1. 945
  2. 90
  3. 855
  4. 900
  5. 675
  6. 195
  7. 615
  8. 465
  9. 900
  10. 855
  11. 540
  12. 930
  13. 135
  14. 270
  15. 225
  16. 150
  17. 585
  18. 300
  19. 720
  20. 600
  21. 150
  22. 300
  23. 105
  24. 210
  25. 270
  26. 270
  27. 945
  28. 300
  29. 540
  30. 180
  31. 840
  32. 165
  33. 180
  34. 660
  35. 195
  36. 795
  37. 105
  38. 930
  39. 345
  40. 885

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