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Multiply by 15 Worksheet

Speed calculation lesson 8: × 15: ten plus half · Set 372 · 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. 1.46 × 15 =
  2. 2.18 × 15 =
  3. 3.34 × 15 =
  4. 4.33 × 15 =
  5. 5.15 × 15 =
  6. 6.12 × 15 =
  7. 7.61 × 15 =
  8. 8.23 × 15 =
  9. 9.11 × 15 =
  10. 10.16 × 15 =
  11. 11.57 × 15 =
  12. 12.21 × 15 =
  13. 13.26 × 15 =
  14. 14.62 × 15 =
  15. 15.26 × 15 =
  16. 16.46 × 15 =
  17. 17.27 × 15 =
  18. 18.11 × 15 =
  19. 19.46 × 15 =
  20. 20.20 × 15 =
  21. 21.60 × 15 =
  22. 22.40 × 15 =
  23. 23.54 × 15 =
  24. 24.21 × 15 =
  25. 25.13 × 15 =
  26. 26.38 × 15 =
  27. 27.16 × 15 =
  28. 28.41 × 15 =
  29. 29.52 × 15 =
  30. 30.15 × 15 =
  31. 31.21 × 15 =
  32. 32.31 × 15 =
  33. 33.4 × 15 =
  34. 34.31 × 15 =
  35. 35.16 × 15 =
  36. 36.60 × 15 =
  37. 37.52 × 15 =
  38. 38.44 × 15 =
  39. 39.41 × 15 =
  40. 40.12 × 15 =

Answer key

  1. 690
  2. 270
  3. 510
  4. 495
  5. 225
  6. 180
  7. 915
  8. 345
  9. 165
  10. 240
  11. 855
  12. 315
  13. 390
  14. 930
  15. 390
  16. 690
  17. 405
  18. 165
  19. 690
  20. 300
  21. 900
  22. 600
  23. 810
  24. 315
  25. 195
  26. 570
  27. 240
  28. 615
  29. 780
  30. 225
  31. 315
  32. 465
  33. 60
  34. 465
  35. 240
  36. 900
  37. 780
  38. 660
  39. 615
  40. 180

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