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Multiply by 15 Worksheet

Speed calculation lesson 8: × 15: ten plus half · Set 197 · 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. 1.56 × 15 =
  2. 2.58 × 15 =
  3. 3.20 × 15 =
  4. 4.14 × 15 =
  5. 5.50 × 15 =
  6. 6.30 × 15 =
  7. 7.57 × 15 =
  8. 8.27 × 15 =
  9. 9.11 × 15 =
  10. 10.34 × 15 =
  11. 11.47 × 15 =
  12. 12.44 × 15 =
  13. 13.60 × 15 =
  14. 14.47 × 15 =
  15. 15.47 × 15 =
  16. 16.23 × 15 =
  17. 17.47 × 15 =
  18. 18.60 × 15 =
  19. 19.10 × 15 =
  20. 20.7 × 15 =
  21. 21.14 × 15 =
  22. 22.64 × 15 =
  23. 23.4 × 15 =
  24. 24.20 × 15 =
  25. 25.49 × 15 =
  26. 26.16 × 15 =
  27. 27.53 × 15 =
  28. 28.14 × 15 =
  29. 29.14 × 15 =
  30. 30.56 × 15 =
  31. 31.7 × 15 =
  32. 32.31 × 15 =
  33. 33.42 × 15 =
  34. 34.60 × 15 =
  35. 35.44 × 15 =
  36. 36.16 × 15 =
  37. 37.15 × 15 =
  38. 38.41 × 15 =
  39. 39.36 × 15 =
  40. 40.12 × 15 =

Answer key

  1. 840
  2. 870
  3. 300
  4. 210
  5. 750
  6. 450
  7. 855
  8. 405
  9. 165
  10. 510
  11. 705
  12. 660
  13. 900
  14. 705
  15. 705
  16. 345
  17. 705
  18. 900
  19. 150
  20. 105
  21. 210
  22. 960
  23. 60
  24. 300
  25. 735
  26. 240
  27. 795
  28. 210
  29. 210
  30. 840
  31. 105
  32. 465
  33. 630
  34. 900
  35. 660
  36. 240
  37. 225
  38. 615
  39. 540
  40. 180

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