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Multiply by 15 Worksheet

Speed calculation lesson 8: × 15: ten plus half · Set 797 · 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. 1.52 × 15 =
  2. 2.61 × 15 =
  3. 3.37 × 15 =
  4. 4.23 × 15 =
  5. 5.42 × 15 =
  6. 6.16 × 15 =
  7. 7.51 × 15 =
  8. 8.36 × 15 =
  9. 9.10 × 15 =
  10. 10.41 × 15 =
  11. 11.39 × 15 =
  12. 12.14 × 15 =
  13. 13.62 × 15 =
  14. 14.45 × 15 =
  15. 15.14 × 15 =
  16. 16.33 × 15 =
  17. 17.10 × 15 =
  18. 18.6 × 15 =
  19. 19.48 × 15 =
  20. 20.52 × 15 =
  21. 21.18 × 15 =
  22. 22.53 × 15 =
  23. 23.20 × 15 =
  24. 24.47 × 15 =
  25. 25.10 × 15 =
  26. 26.12 × 15 =
  27. 27.32 × 15 =
  28. 28.54 × 15 =
  29. 29.28 × 15 =
  30. 30.26 × 15 =
  31. 31.28 × 15 =
  32. 32.46 × 15 =
  33. 33.43 × 15 =
  34. 34.35 × 15 =
  35. 35.12 × 15 =
  36. 36.63 × 15 =
  37. 37.21 × 15 =
  38. 38.45 × 15 =
  39. 39.23 × 15 =
  40. 40.33 × 15 =

Answer key

  1. 780
  2. 915
  3. 555
  4. 345
  5. 630
  6. 240
  7. 765
  8. 540
  9. 150
  10. 615
  11. 585
  12. 210
  13. 930
  14. 675
  15. 210
  16. 495
  17. 150
  18. 90
  19. 720
  20. 780
  21. 270
  22. 795
  23. 300
  24. 705
  25. 150
  26. 180
  27. 480
  28. 810
  29. 420
  30. 390
  31. 420
  32. 690
  33. 645
  34. 525
  35. 180
  36. 945
  37. 315
  38. 675
  39. 345
  40. 495

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