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Multiply by 15 Worksheet

Speed calculation lesson 8: × 15: ten plus half · Set 949 · 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. 1.44 × 15 =
  2. 2.22 × 15 =
  3. 3.19 × 15 =
  4. 4.27 × 15 =
  5. 5.27 × 15 =
  6. 6.49 × 15 =
  7. 7.48 × 15 =
  8. 8.19 × 15 =
  9. 9.62 × 15 =
  10. 10.8 × 15 =
  11. 11.34 × 15 =
  12. 12.60 × 15 =
  13. 13.20 × 15 =
  14. 14.39 × 15 =
  15. 15.62 × 15 =
  16. 16.47 × 15 =
  17. 17.57 × 15 =
  18. 18.6 × 15 =
  19. 19.60 × 15 =
  20. 20.5 × 15 =
  21. 21.7 × 15 =
  22. 22.22 × 15 =
  23. 23.24 × 15 =
  24. 24.35 × 15 =
  25. 25.54 × 15 =
  26. 26.40 × 15 =
  27. 27.11 × 15 =
  28. 28.19 × 15 =
  29. 29.10 × 15 =
  30. 30.54 × 15 =
  31. 31.23 × 15 =
  32. 32.34 × 15 =
  33. 33.51 × 15 =
  34. 34.5 × 15 =
  35. 35.8 × 15 =
  36. 36.21 × 15 =
  37. 37.23 × 15 =
  38. 38.52 × 15 =
  39. 39.11 × 15 =
  40. 40.51 × 15 =

Answer key

  1. 660
  2. 330
  3. 285
  4. 405
  5. 405
  6. 735
  7. 720
  8. 285
  9. 930
  10. 120
  11. 510
  12. 900
  13. 300
  14. 585
  15. 930
  16. 705
  17. 855
  18. 90
  19. 900
  20. 75
  21. 105
  22. 330
  23. 360
  24. 525
  25. 810
  26. 600
  27. 165
  28. 285
  29. 150
  30. 810
  31. 345
  32. 510
  33. 765
  34. 75
  35. 120
  36. 315
  37. 345
  38. 780
  39. 165
  40. 765

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