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Multiply by 15 Worksheet

Speed calculation lesson 8: × 15: ten plus half · Set 546 · 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. 1.62 × 15 =
  2. 2.9 × 15 =
  3. 3.47 × 15 =
  4. 4.38 × 15 =
  5. 5.17 × 15 =
  6. 6.26 × 15 =
  7. 7.8 × 15 =
  8. 8.17 × 15 =
  9. 9.11 × 15 =
  10. 10.14 × 15 =
  11. 11.55 × 15 =
  12. 12.7 × 15 =
  13. 13.60 × 15 =
  14. 14.20 × 15 =
  15. 15.21 × 15 =
  16. 16.16 × 15 =
  17. 17.40 × 15 =
  18. 18.60 × 15 =
  19. 19.17 × 15 =
  20. 20.27 × 15 =
  21. 21.31 × 15 =
  22. 22.46 × 15 =
  23. 23.20 × 15 =
  24. 24.6 × 15 =
  25. 25.37 × 15 =
  26. 26.26 × 15 =
  27. 27.36 × 15 =
  28. 28.49 × 15 =
  29. 29.49 × 15 =
  30. 30.57 × 15 =
  31. 31.14 × 15 =
  32. 32.51 × 15 =
  33. 33.8 × 15 =
  34. 34.48 × 15 =
  35. 35.58 × 15 =
  36. 36.47 × 15 =
  37. 37.48 × 15 =
  38. 38.62 × 15 =
  39. 39.23 × 15 =
  40. 40.33 × 15 =

Answer key

  1. 930
  2. 135
  3. 705
  4. 570
  5. 255
  6. 390
  7. 120
  8. 255
  9. 165
  10. 210
  11. 825
  12. 105
  13. 900
  14. 300
  15. 315
  16. 240
  17. 600
  18. 900
  19. 255
  20. 405
  21. 465
  22. 690
  23. 300
  24. 90
  25. 555
  26. 390
  27. 540
  28. 735
  29. 735
  30. 855
  31. 210
  32. 765
  33. 120
  34. 720
  35. 870
  36. 705
  37. 720
  38. 930
  39. 345
  40. 495

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