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Multiply by 15 Worksheet

Speed calculation lesson 8: × 15: ten plus half · Set 898 · 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. 2.15 × 15 =
  3. 3.54 × 15 =
  4. 4.35 × 15 =
  5. 5.21 × 15 =
  6. 6.40 × 15 =
  7. 7.56 × 15 =
  8. 8.48 × 15 =
  9. 9.52 × 15 =
  10. 10.50 × 15 =
  11. 11.21 × 15 =
  12. 12.13 × 15 =
  13. 13.27 × 15 =
  14. 14.7 × 15 =
  15. 15.30 × 15 =
  16. 16.12 × 15 =
  17. 17.63 × 15 =
  18. 18.19 × 15 =
  19. 19.15 × 15 =
  20. 20.63 × 15 =
  21. 21.26 × 15 =
  22. 22.34 × 15 =
  23. 23.19 × 15 =
  24. 24.47 × 15 =
  25. 25.20 × 15 =
  26. 26.38 × 15 =
  27. 27.10 × 15 =
  28. 28.57 × 15 =
  29. 29.9 × 15 =
  30. 30.55 × 15 =
  31. 31.17 × 15 =
  32. 32.25 × 15 =
  33. 33.24 × 15 =
  34. 34.19 × 15 =
  35. 35.5 × 15 =
  36. 36.31 × 15 =
  37. 37.64 × 15 =
  38. 38.40 × 15 =
  39. 39.17 × 15 =
  40. 40.19 × 15 =

Answer key

  1. 780
  2. 225
  3. 810
  4. 525
  5. 315
  6. 600
  7. 840
  8. 720
  9. 780
  10. 750
  11. 315
  12. 195
  13. 405
  14. 105
  15. 450
  16. 180
  17. 945
  18. 285
  19. 225
  20. 945
  21. 390
  22. 510
  23. 285
  24. 705
  25. 300
  26. 570
  27. 150
  28. 855
  29. 135
  30. 825
  31. 255
  32. 375
  33. 360
  34. 285
  35. 75
  36. 465
  37. 960
  38. 600
  39. 255
  40. 285

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