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Multiply by 15 Worksheet

Speed calculation lesson 8: × 15: ten plus half · Set 35 · 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. 1.8 × 15 =
  2. 2.61 × 15 =
  3. 3.17 × 15 =
  4. 4.18 × 15 =
  5. 5.16 × 15 =
  6. 6.58 × 15 =
  7. 7.50 × 15 =
  8. 8.55 × 15 =
  9. 9.62 × 15 =
  10. 10.39 × 15 =
  11. 11.14 × 15 =
  12. 12.23 × 15 =
  13. 13.5 × 15 =
  14. 14.21 × 15 =
  15. 15.14 × 15 =
  16. 16.26 × 15 =
  17. 17.53 × 15 =
  18. 18.34 × 15 =
  19. 19.49 × 15 =
  20. 20.19 × 15 =
  21. 21.54 × 15 =
  22. 22.33 × 15 =
  23. 23.57 × 15 =
  24. 24.28 × 15 =
  25. 25.53 × 15 =
  26. 26.21 × 15 =
  27. 27.25 × 15 =
  28. 28.26 × 15 =
  29. 29.52 × 15 =
  30. 30.52 × 15 =
  31. 31.8 × 15 =
  32. 32.57 × 15 =
  33. 33.57 × 15 =
  34. 34.41 × 15 =
  35. 35.35 × 15 =
  36. 36.15 × 15 =
  37. 37.34 × 15 =
  38. 38.28 × 15 =
  39. 39.35 × 15 =
  40. 40.20 × 15 =

Answer key

  1. 120
  2. 915
  3. 255
  4. 270
  5. 240
  6. 870
  7. 750
  8. 825
  9. 930
  10. 585
  11. 210
  12. 345
  13. 75
  14. 315
  15. 210
  16. 390
  17. 795
  18. 510
  19. 735
  20. 285
  21. 810
  22. 495
  23. 855
  24. 420
  25. 795
  26. 315
  27. 375
  28. 390
  29. 780
  30. 780
  31. 120
  32. 855
  33. 855
  34. 615
  35. 525
  36. 225
  37. 510
  38. 420
  39. 525
  40. 300

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