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Multiply by 15 Worksheet

Speed calculation lesson 8: × 15: ten plus half · Set 123 · 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. 1.45 × 15 =
  2. 2.41 × 15 =
  3. 3.55 × 15 =
  4. 4.20 × 15 =
  5. 5.42 × 15 =
  6. 6.13 × 15 =
  7. 7.44 × 15 =
  8. 8.37 × 15 =
  9. 9.64 × 15 =
  10. 10.64 × 15 =
  11. 11.12 × 15 =
  12. 12.34 × 15 =
  13. 13.64 × 15 =
  14. 14.64 × 15 =
  15. 15.56 × 15 =
  16. 16.31 × 15 =
  17. 17.11 × 15 =
  18. 18.59 × 15 =
  19. 19.20 × 15 =
  20. 20.47 × 15 =
  21. 21.8 × 15 =
  22. 22.7 × 15 =
  23. 23.15 × 15 =
  24. 24.44 × 15 =
  25. 25.22 × 15 =
  26. 26.49 × 15 =
  27. 27.39 × 15 =
  28. 28.44 × 15 =
  29. 29.11 × 15 =
  30. 30.38 × 15 =
  31. 31.18 × 15 =
  32. 32.31 × 15 =
  33. 33.10 × 15 =
  34. 34.18 × 15 =
  35. 35.13 × 15 =
  36. 36.54 × 15 =
  37. 37.18 × 15 =
  38. 38.50 × 15 =
  39. 39.4 × 15 =
  40. 40.63 × 15 =

Answer key

  1. 675
  2. 615
  3. 825
  4. 300
  5. 630
  6. 195
  7. 660
  8. 555
  9. 960
  10. 960
  11. 180
  12. 510
  13. 960
  14. 960
  15. 840
  16. 465
  17. 165
  18. 885
  19. 300
  20. 705
  21. 120
  22. 105
  23. 225
  24. 660
  25. 330
  26. 735
  27. 585
  28. 660
  29. 165
  30. 570
  31. 270
  32. 465
  33. 150
  34. 270
  35. 195
  36. 810
  37. 270
  38. 750
  39. 60
  40. 945

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