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Multiply by 15 Worksheet

Speed calculation lesson 8: × 15: ten plus half · Set 249 · 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. 1.23 × 15 =
  2. 2.27 × 15 =
  3. 3.54 × 15 =
  4. 4.38 × 15 =
  5. 5.13 × 15 =
  6. 6.7 × 15 =
  7. 7.54 × 15 =
  8. 8.19 × 15 =
  9. 9.31 × 15 =
  10. 10.7 × 15 =
  11. 11.47 × 15 =
  12. 12.59 × 15 =
  13. 13.59 × 15 =
  14. 14.26 × 15 =
  15. 15.19 × 15 =
  16. 16.63 × 15 =
  17. 17.54 × 15 =
  18. 18.40 × 15 =
  19. 19.14 × 15 =
  20. 20.32 × 15 =
  21. 21.19 × 15 =
  22. 22.10 × 15 =
  23. 23.61 × 15 =
  24. 24.22 × 15 =
  25. 25.59 × 15 =
  26. 26.44 × 15 =
  27. 27.22 × 15 =
  28. 28.8 × 15 =
  29. 29.59 × 15 =
  30. 30.16 × 15 =
  31. 31.11 × 15 =
  32. 32.59 × 15 =
  33. 33.51 × 15 =
  34. 34.10 × 15 =
  35. 35.21 × 15 =
  36. 36.5 × 15 =
  37. 37.43 × 15 =
  38. 38.18 × 15 =
  39. 39.39 × 15 =
  40. 40.12 × 15 =

Answer key

  1. 345
  2. 405
  3. 810
  4. 570
  5. 195
  6. 105
  7. 810
  8. 285
  9. 465
  10. 105
  11. 705
  12. 885
  13. 885
  14. 390
  15. 285
  16. 945
  17. 810
  18. 600
  19. 210
  20. 480
  21. 285
  22. 150
  23. 915
  24. 330
  25. 885
  26. 660
  27. 330
  28. 120
  29. 885
  30. 240
  31. 165
  32. 885
  33. 765
  34. 150
  35. 315
  36. 75
  37. 645
  38. 270
  39. 585
  40. 180

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