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Multiply by 15 Worksheet

Speed calculation lesson 8: × 15: ten plus half · Set 166 · 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. 1.60 × 15 =
  2. 2.17 × 15 =
  3. 3.61 × 15 =
  4. 4.24 × 15 =
  5. 5.54 × 15 =
  6. 6.28 × 15 =
  7. 7.36 × 15 =
  8. 8.7 × 15 =
  9. 9.58 × 15 =
  10. 10.8 × 15 =
  11. 11.29 × 15 =
  12. 12.18 × 15 =
  13. 13.37 × 15 =
  14. 14.5 × 15 =
  15. 15.25 × 15 =
  16. 16.40 × 15 =
  17. 17.50 × 15 =
  18. 18.61 × 15 =
  19. 19.5 × 15 =
  20. 20.7 × 15 =
  21. 21.47 × 15 =
  22. 22.12 × 15 =
  23. 23.4 × 15 =
  24. 24.11 × 15 =
  25. 25.31 × 15 =
  26. 26.47 × 15 =
  27. 27.26 × 15 =
  28. 28.51 × 15 =
  29. 29.20 × 15 =
  30. 30.44 × 15 =
  31. 31.30 × 15 =
  32. 32.12 × 15 =
  33. 33.13 × 15 =
  34. 34.14 × 15 =
  35. 35.48 × 15 =
  36. 36.62 × 15 =
  37. 37.8 × 15 =
  38. 38.55 × 15 =
  39. 39.10 × 15 =
  40. 40.28 × 15 =

Answer key

  1. 900
  2. 255
  3. 915
  4. 360
  5. 810
  6. 420
  7. 540
  8. 105
  9. 870
  10. 120
  11. 435
  12. 270
  13. 555
  14. 75
  15. 375
  16. 600
  17. 750
  18. 915
  19. 75
  20. 105
  21. 705
  22. 180
  23. 60
  24. 165
  25. 465
  26. 705
  27. 390
  28. 765
  29. 300
  30. 660
  31. 450
  32. 180
  33. 195
  34. 210
  35. 720
  36. 930
  37. 120
  38. 825
  39. 150
  40. 420

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