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Multiply by 15 Worksheet

Speed calculation lesson 8: × 15: ten plus half · Set 559 · 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. 1.9 × 15 =
  2. 2.31 × 15 =
  3. 3.49 × 15 =
  4. 4.48 × 15 =
  5. 5.59 × 15 =
  6. 6.64 × 15 =
  7. 7.61 × 15 =
  8. 8.24 × 15 =
  9. 9.44 × 15 =
  10. 10.23 × 15 =
  11. 11.23 × 15 =
  12. 12.54 × 15 =
  13. 13.12 × 15 =
  14. 14.61 × 15 =
  15. 15.63 × 15 =
  16. 16.17 × 15 =
  17. 17.29 × 15 =
  18. 18.29 × 15 =
  19. 19.17 × 15 =
  20. 20.36 × 15 =
  21. 21.55 × 15 =
  22. 22.25 × 15 =
  23. 23.50 × 15 =
  24. 24.20 × 15 =
  25. 25.35 × 15 =
  26. 26.11 × 15 =
  27. 27.41 × 15 =
  28. 28.40 × 15 =
  29. 29.31 × 15 =
  30. 30.29 × 15 =
  31. 31.20 × 15 =
  32. 32.60 × 15 =
  33. 33.44 × 15 =
  34. 34.30 × 15 =
  35. 35.6 × 15 =
  36. 36.19 × 15 =
  37. 37.57 × 15 =
  38. 38.56 × 15 =
  39. 39.58 × 15 =
  40. 40.36 × 15 =

Answer key

  1. 135
  2. 465
  3. 735
  4. 720
  5. 885
  6. 960
  7. 915
  8. 360
  9. 660
  10. 345
  11. 345
  12. 810
  13. 180
  14. 915
  15. 945
  16. 255
  17. 435
  18. 435
  19. 255
  20. 540
  21. 825
  22. 375
  23. 750
  24. 300
  25. 525
  26. 165
  27. 615
  28. 600
  29. 465
  30. 435
  31. 300
  32. 900
  33. 660
  34. 450
  35. 90
  36. 285
  37. 855
  38. 840
  39. 870
  40. 540

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