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Multiply by 15 Worksheet

Speed calculation lesson 8: × 15: ten plus half · Set 735 · 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. 1.44 × 15 =
  2. 2.22 × 15 =
  3. 3.53 × 15 =
  4. 4.12 × 15 =
  5. 5.28 × 15 =
  6. 6.5 × 15 =
  7. 7.4 × 15 =
  8. 8.11 × 15 =
  9. 9.30 × 15 =
  10. 10.15 × 15 =
  11. 11.36 × 15 =
  12. 12.9 × 15 =
  13. 13.37 × 15 =
  14. 14.54 × 15 =
  15. 15.46 × 15 =
  16. 16.43 × 15 =
  17. 17.63 × 15 =
  18. 18.40 × 15 =
  19. 19.54 × 15 =
  20. 20.43 × 15 =
  21. 21.14 × 15 =
  22. 22.52 × 15 =
  23. 23.61 × 15 =
  24. 24.43 × 15 =
  25. 25.7 × 15 =
  26. 26.33 × 15 =
  27. 27.41 × 15 =
  28. 28.21 × 15 =
  29. 29.45 × 15 =
  30. 30.5 × 15 =
  31. 31.62 × 15 =
  32. 32.30 × 15 =
  33. 33.43 × 15 =
  34. 34.11 × 15 =
  35. 35.56 × 15 =
  36. 36.28 × 15 =
  37. 37.6 × 15 =
  38. 38.39 × 15 =
  39. 39.36 × 15 =
  40. 40.38 × 15 =

Answer key

  1. 660
  2. 330
  3. 795
  4. 180
  5. 420
  6. 75
  7. 60
  8. 165
  9. 450
  10. 225
  11. 540
  12. 135
  13. 555
  14. 810
  15. 690
  16. 645
  17. 945
  18. 600
  19. 810
  20. 645
  21. 210
  22. 780
  23. 915
  24. 645
  25. 105
  26. 495
  27. 615
  28. 315
  29. 675
  30. 75
  31. 930
  32. 450
  33. 645
  34. 165
  35. 840
  36. 420
  37. 90
  38. 585
  39. 540
  40. 570

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