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Multiply by 15 Worksheet

Speed calculation lesson 8: × 15: ten plus half · Set 348 · 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. 1.42 × 15 =
  2. 2.20 × 15 =
  3. 3.27 × 15 =
  4. 4.15 × 15 =
  5. 5.64 × 15 =
  6. 6.60 × 15 =
  7. 7.54 × 15 =
  8. 8.8 × 15 =
  9. 9.16 × 15 =
  10. 10.32 × 15 =
  11. 11.38 × 15 =
  12. 12.26 × 15 =
  13. 13.61 × 15 =
  14. 14.58 × 15 =
  15. 15.8 × 15 =
  16. 16.16 × 15 =
  17. 17.12 × 15 =
  18. 18.9 × 15 =
  19. 19.16 × 15 =
  20. 20.24 × 15 =
  21. 21.27 × 15 =
  22. 22.43 × 15 =
  23. 23.16 × 15 =
  24. 24.43 × 15 =
  25. 25.19 × 15 =
  26. 26.18 × 15 =
  27. 27.59 × 15 =
  28. 28.64 × 15 =
  29. 29.30 × 15 =
  30. 30.34 × 15 =
  31. 31.16 × 15 =
  32. 32.19 × 15 =
  33. 33.63 × 15 =
  34. 34.63 × 15 =
  35. 35.25 × 15 =
  36. 36.6 × 15 =
  37. 37.20 × 15 =
  38. 38.62 × 15 =
  39. 39.62 × 15 =
  40. 40.18 × 15 =

Answer key

  1. 630
  2. 300
  3. 405
  4. 225
  5. 960
  6. 900
  7. 810
  8. 120
  9. 240
  10. 480
  11. 570
  12. 390
  13. 915
  14. 870
  15. 120
  16. 240
  17. 180
  18. 135
  19. 240
  20. 360
  21. 405
  22. 645
  23. 240
  24. 645
  25. 285
  26. 270
  27. 885
  28. 960
  29. 450
  30. 510
  31. 240
  32. 285
  33. 945
  34. 945
  35. 375
  36. 90
  37. 300
  38. 930
  39. 930
  40. 270

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