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Multiply by 15 Worksheet

Speed calculation lesson 8: × 15: ten plus half · Set 736 · 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. 1.38 × 15 =
  2. 2.58 × 15 =
  3. 3.8 × 15 =
  4. 4.38 × 15 =
  5. 5.51 × 15 =
  6. 6.58 × 15 =
  7. 7.11 × 15 =
  8. 8.14 × 15 =
  9. 9.54 × 15 =
  10. 10.36 × 15 =
  11. 11.23 × 15 =
  12. 12.40 × 15 =
  13. 13.36 × 15 =
  14. 14.51 × 15 =
  15. 15.4 × 15 =
  16. 16.58 × 15 =
  17. 17.49 × 15 =
  18. 18.48 × 15 =
  19. 19.19 × 15 =
  20. 20.20 × 15 =
  21. 21.57 × 15 =
  22. 22.49 × 15 =
  23. 23.47 × 15 =
  24. 24.25 × 15 =
  25. 25.10 × 15 =
  26. 26.26 × 15 =
  27. 27.61 × 15 =
  28. 28.26 × 15 =
  29. 29.10 × 15 =
  30. 30.46 × 15 =
  31. 31.7 × 15 =
  32. 32.44 × 15 =
  33. 33.5 × 15 =
  34. 34.9 × 15 =
  35. 35.21 × 15 =
  36. 36.8 × 15 =
  37. 37.44 × 15 =
  38. 38.46 × 15 =
  39. 39.25 × 15 =
  40. 40.8 × 15 =

Answer key

  1. 570
  2. 870
  3. 120
  4. 570
  5. 765
  6. 870
  7. 165
  8. 210
  9. 810
  10. 540
  11. 345
  12. 600
  13. 540
  14. 765
  15. 60
  16. 870
  17. 735
  18. 720
  19. 285
  20. 300
  21. 855
  22. 735
  23. 705
  24. 375
  25. 150
  26. 390
  27. 915
  28. 390
  29. 150
  30. 690
  31. 105
  32. 660
  33. 75
  34. 135
  35. 315
  36. 120
  37. 660
  38. 690
  39. 375
  40. 120

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