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Multiply by 15 Worksheet

Speed calculation lesson 8: × 15: ten plus half · Set 604 · 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. 1.41 × 15 =
  2. 2.45 × 15 =
  3. 3.8 × 15 =
  4. 4.57 × 15 =
  5. 5.53 × 15 =
  6. 6.30 × 15 =
  7. 7.35 × 15 =
  8. 8.37 × 15 =
  9. 9.23 × 15 =
  10. 10.22 × 15 =
  11. 11.44 × 15 =
  12. 12.13 × 15 =
  13. 13.45 × 15 =
  14. 14.19 × 15 =
  15. 15.12 × 15 =
  16. 16.41 × 15 =
  17. 17.40 × 15 =
  18. 18.44 × 15 =
  19. 19.18 × 15 =
  20. 20.58 × 15 =
  21. 21.56 × 15 =
  22. 22.35 × 15 =
  23. 23.6 × 15 =
  24. 24.34 × 15 =
  25. 25.44 × 15 =
  26. 26.61 × 15 =
  27. 27.23 × 15 =
  28. 28.54 × 15 =
  29. 29.15 × 15 =
  30. 30.22 × 15 =
  31. 31.9 × 15 =
  32. 32.30 × 15 =
  33. 33.25 × 15 =
  34. 34.63 × 15 =
  35. 35.8 × 15 =
  36. 36.39 × 15 =
  37. 37.46 × 15 =
  38. 38.13 × 15 =
  39. 39.32 × 15 =
  40. 40.56 × 15 =

Answer key

  1. 615
  2. 675
  3. 120
  4. 855
  5. 795
  6. 450
  7. 525
  8. 555
  9. 345
  10. 330
  11. 660
  12. 195
  13. 675
  14. 285
  15. 180
  16. 615
  17. 600
  18. 660
  19. 270
  20. 870
  21. 840
  22. 525
  23. 90
  24. 510
  25. 660
  26. 915
  27. 345
  28. 810
  29. 225
  30. 330
  31. 135
  32. 450
  33. 375
  34. 945
  35. 120
  36. 585
  37. 690
  38. 195
  39. 480
  40. 840

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