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Multiply by 15 Worksheet

Speed calculation lesson 8: × 15: ten plus half · Set 982 · 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. 1.24 × 15 =
  2. 2.48 × 15 =
  3. 3.16 × 15 =
  4. 4.30 × 15 =
  5. 5.38 × 15 =
  6. 6.9 × 15 =
  7. 7.19 × 15 =
  8. 8.17 × 15 =
  9. 9.5 × 15 =
  10. 10.23 × 15 =
  11. 11.49 × 15 =
  12. 12.15 × 15 =
  13. 13.16 × 15 =
  14. 14.50 × 15 =
  15. 15.45 × 15 =
  16. 16.40 × 15 =
  17. 17.21 × 15 =
  18. 18.10 × 15 =
  19. 19.18 × 15 =
  20. 20.41 × 15 =
  21. 21.14 × 15 =
  22. 22.11 × 15 =
  23. 23.21 × 15 =
  24. 24.33 × 15 =
  25. 25.21 × 15 =
  26. 26.54 × 15 =
  27. 27.62 × 15 =
  28. 28.30 × 15 =
  29. 29.20 × 15 =
  30. 30.53 × 15 =
  31. 31.63 × 15 =
  32. 32.27 × 15 =
  33. 33.38 × 15 =
  34. 34.58 × 15 =
  35. 35.5 × 15 =
  36. 36.21 × 15 =
  37. 37.26 × 15 =
  38. 38.4 × 15 =
  39. 39.20 × 15 =
  40. 40.36 × 15 =

Answer key

  1. 360
  2. 720
  3. 240
  4. 450
  5. 570
  6. 135
  7. 285
  8. 255
  9. 75
  10. 345
  11. 735
  12. 225
  13. 240
  14. 750
  15. 675
  16. 600
  17. 315
  18. 150
  19. 270
  20. 615
  21. 210
  22. 165
  23. 315
  24. 495
  25. 315
  26. 810
  27. 930
  28. 450
  29. 300
  30. 795
  31. 945
  32. 405
  33. 570
  34. 870
  35. 75
  36. 315
  37. 390
  38. 60
  39. 300
  40. 540

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