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Multiply by 15 Worksheet

Speed calculation lesson 8: × 15: ten plus half · Set 904 · 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. 1.20 × 15 =
  2. 2.46 × 15 =
  3. 3.26 × 15 =
  4. 4.61 × 15 =
  5. 5.63 × 15 =
  6. 6.42 × 15 =
  7. 7.38 × 15 =
  8. 8.51 × 15 =
  9. 9.57 × 15 =
  10. 10.27 × 15 =
  11. 11.49 × 15 =
  12. 12.17 × 15 =
  13. 13.11 × 15 =
  14. 14.45 × 15 =
  15. 15.10 × 15 =
  16. 16.14 × 15 =
  17. 17.27 × 15 =
  18. 18.55 × 15 =
  19. 19.18 × 15 =
  20. 20.11 × 15 =
  21. 21.37 × 15 =
  22. 22.21 × 15 =
  23. 23.4 × 15 =
  24. 24.47 × 15 =
  25. 25.42 × 15 =
  26. 26.21 × 15 =
  27. 27.43 × 15 =
  28. 28.14 × 15 =
  29. 29.18 × 15 =
  30. 30.7 × 15 =
  31. 31.25 × 15 =
  32. 32.23 × 15 =
  33. 33.58 × 15 =
  34. 34.5 × 15 =
  35. 35.42 × 15 =
  36. 36.18 × 15 =
  37. 37.47 × 15 =
  38. 38.49 × 15 =
  39. 39.36 × 15 =
  40. 40.20 × 15 =

Answer key

  1. 300
  2. 690
  3. 390
  4. 915
  5. 945
  6. 630
  7. 570
  8. 765
  9. 855
  10. 405
  11. 735
  12. 255
  13. 165
  14. 675
  15. 150
  16. 210
  17. 405
  18. 825
  19. 270
  20. 165
  21. 555
  22. 315
  23. 60
  24. 705
  25. 630
  26. 315
  27. 645
  28. 210
  29. 270
  30. 105
  31. 375
  32. 345
  33. 870
  34. 75
  35. 630
  36. 270
  37. 705
  38. 735
  39. 540
  40. 300

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