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Multiply by 15 Worksheet

Speed calculation lesson 8: × 15: ten plus half · Set 34 · 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. 1.54 × 15 =
  2. 2.19 × 15 =
  3. 3.38 × 15 =
  4. 4.39 × 15 =
  5. 5.40 × 15 =
  6. 6.17 × 15 =
  7. 7.22 × 15 =
  8. 8.41 × 15 =
  9. 9.52 × 15 =
  10. 10.13 × 15 =
  11. 11.15 × 15 =
  12. 12.30 × 15 =
  13. 13.40 × 15 =
  14. 14.23 × 15 =
  15. 15.51 × 15 =
  16. 16.42 × 15 =
  17. 17.22 × 15 =
  18. 18.51 × 15 =
  19. 19.21 × 15 =
  20. 20.37 × 15 =
  21. 21.13 × 15 =
  22. 22.22 × 15 =
  23. 23.56 × 15 =
  24. 24.38 × 15 =
  25. 25.54 × 15 =
  26. 26.10 × 15 =
  27. 27.33 × 15 =
  28. 28.17 × 15 =
  29. 29.62 × 15 =
  30. 30.58 × 15 =
  31. 31.4 × 15 =
  32. 32.35 × 15 =
  33. 33.46 × 15 =
  34. 34.16 × 15 =
  35. 35.58 × 15 =
  36. 36.14 × 15 =
  37. 37.19 × 15 =
  38. 38.47 × 15 =
  39. 39.43 × 15 =
  40. 40.57 × 15 =

Answer key

  1. 810
  2. 285
  3. 570
  4. 585
  5. 600
  6. 255
  7. 330
  8. 615
  9. 780
  10. 195
  11. 225
  12. 450
  13. 600
  14. 345
  15. 765
  16. 630
  17. 330
  18. 765
  19. 315
  20. 555
  21. 195
  22. 330
  23. 840
  24. 570
  25. 810
  26. 150
  27. 495
  28. 255
  29. 930
  30. 870
  31. 60
  32. 525
  33. 690
  34. 240
  35. 870
  36. 210
  37. 285
  38. 705
  39. 645
  40. 855

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