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Multiply by 15 Worksheet

Speed calculation lesson 8: × 15: ten plus half · Set 611 · 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. 1.21 × 15 =
  2. 2.10 × 15 =
  3. 3.35 × 15 =
  4. 4.18 × 15 =
  5. 5.8 × 15 =
  6. 6.59 × 15 =
  7. 7.9 × 15 =
  8. 8.55 × 15 =
  9. 9.38 × 15 =
  10. 10.42 × 15 =
  11. 11.52 × 15 =
  12. 12.57 × 15 =
  13. 13.49 × 15 =
  14. 14.23 × 15 =
  15. 15.38 × 15 =
  16. 16.27 × 15 =
  17. 17.29 × 15 =
  18. 18.41 × 15 =
  19. 19.10 × 15 =
  20. 20.59 × 15 =
  21. 21.46 × 15 =
  22. 22.14 × 15 =
  23. 23.30 × 15 =
  24. 24.64 × 15 =
  25. 25.35 × 15 =
  26. 26.7 × 15 =
  27. 27.17 × 15 =
  28. 28.10 × 15 =
  29. 29.34 × 15 =
  30. 30.41 × 15 =
  31. 31.48 × 15 =
  32. 32.49 × 15 =
  33. 33.35 × 15 =
  34. 34.56 × 15 =
  35. 35.51 × 15 =
  36. 36.46 × 15 =
  37. 37.21 × 15 =
  38. 38.45 × 15 =
  39. 39.43 × 15 =
  40. 40.62 × 15 =

Answer key

  1. 315
  2. 150
  3. 525
  4. 270
  5. 120
  6. 885
  7. 135
  8. 825
  9. 570
  10. 630
  11. 780
  12. 855
  13. 735
  14. 345
  15. 570
  16. 405
  17. 435
  18. 615
  19. 150
  20. 885
  21. 690
  22. 210
  23. 450
  24. 960
  25. 525
  26. 105
  27. 255
  28. 150
  29. 510
  30. 615
  31. 720
  32. 735
  33. 525
  34. 840
  35. 765
  36. 690
  37. 315
  38. 675
  39. 645
  40. 930

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