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Multiply by 15 Worksheet

Speed calculation lesson 8: × 15: ten plus half · Set 987 · 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. 1.15 × 15 =
  2. 2.40 × 15 =
  3. 3.61 × 15 =
  4. 4.34 × 15 =
  5. 5.42 × 15 =
  6. 6.56 × 15 =
  7. 7.13 × 15 =
  8. 8.28 × 15 =
  9. 9.40 × 15 =
  10. 10.6 × 15 =
  11. 11.16 × 15 =
  12. 12.21 × 15 =
  13. 13.13 × 15 =
  14. 14.50 × 15 =
  15. 15.21 × 15 =
  16. 16.47 × 15 =
  17. 17.13 × 15 =
  18. 18.39 × 15 =
  19. 19.62 × 15 =
  20. 20.44 × 15 =
  21. 21.47 × 15 =
  22. 22.28 × 15 =
  23. 23.25 × 15 =
  24. 24.45 × 15 =
  25. 25.41 × 15 =
  26. 26.15 × 15 =
  27. 27.17 × 15 =
  28. 28.37 × 15 =
  29. 29.22 × 15 =
  30. 30.52 × 15 =
  31. 31.60 × 15 =
  32. 32.16 × 15 =
  33. 33.57 × 15 =
  34. 34.42 × 15 =
  35. 35.14 × 15 =
  36. 36.48 × 15 =
  37. 37.60 × 15 =
  38. 38.8 × 15 =
  39. 39.13 × 15 =
  40. 40.63 × 15 =

Answer key

  1. 225
  2. 600
  3. 915
  4. 510
  5. 630
  6. 840
  7. 195
  8. 420
  9. 600
  10. 90
  11. 240
  12. 315
  13. 195
  14. 750
  15. 315
  16. 705
  17. 195
  18. 585
  19. 930
  20. 660
  21. 705
  22. 420
  23. 375
  24. 675
  25. 615
  26. 225
  27. 255
  28. 555
  29. 330
  30. 780
  31. 900
  32. 240
  33. 855
  34. 630
  35. 210
  36. 720
  37. 900
  38. 120
  39. 195
  40. 945

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