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Multiply by 15 Worksheet

Speed calculation lesson 8: × 15: ten plus half · Set 253 · 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. 1.57 × 15 =
  2. 2.46 × 15 =
  3. 3.51 × 15 =
  4. 4.40 × 15 =
  5. 5.7 × 15 =
  6. 6.57 × 15 =
  7. 7.46 × 15 =
  8. 8.38 × 15 =
  9. 9.14 × 15 =
  10. 10.5 × 15 =
  11. 11.7 × 15 =
  12. 12.6 × 15 =
  13. 13.25 × 15 =
  14. 14.58 × 15 =
  15. 15.39 × 15 =
  16. 16.31 × 15 =
  17. 17.64 × 15 =
  18. 18.11 × 15 =
  19. 19.6 × 15 =
  20. 20.60 × 15 =
  21. 21.37 × 15 =
  22. 22.50 × 15 =
  23. 23.19 × 15 =
  24. 24.26 × 15 =
  25. 25.63 × 15 =
  26. 26.48 × 15 =
  27. 27.25 × 15 =
  28. 28.12 × 15 =
  29. 29.15 × 15 =
  30. 30.8 × 15 =
  31. 31.39 × 15 =
  32. 32.61 × 15 =
  33. 33.25 × 15 =
  34. 34.9 × 15 =
  35. 35.43 × 15 =
  36. 36.22 × 15 =
  37. 37.6 × 15 =
  38. 38.4 × 15 =
  39. 39.19 × 15 =
  40. 40.14 × 15 =

Answer key

  1. 855
  2. 690
  3. 765
  4. 600
  5. 105
  6. 855
  7. 690
  8. 570
  9. 210
  10. 75
  11. 105
  12. 90
  13. 375
  14. 870
  15. 585
  16. 465
  17. 960
  18. 165
  19. 90
  20. 900
  21. 555
  22. 750
  23. 285
  24. 390
  25. 945
  26. 720
  27. 375
  28. 180
  29. 225
  30. 120
  31. 585
  32. 915
  33. 375
  34. 135
  35. 645
  36. 330
  37. 90
  38. 60
  39. 285
  40. 210

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