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Multiply by 15 Worksheet

Speed calculation lesson 8: × 15: ten plus half · Set 564 · 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. 1.12 × 15 =
  2. 2.38 × 15 =
  3. 3.25 × 15 =
  4. 4.38 × 15 =
  5. 5.14 × 15 =
  6. 6.61 × 15 =
  7. 7.44 × 15 =
  8. 8.12 × 15 =
  9. 9.15 × 15 =
  10. 10.49 × 15 =
  11. 11.19 × 15 =
  12. 12.54 × 15 =
  13. 13.48 × 15 =
  14. 14.21 × 15 =
  15. 15.46 × 15 =
  16. 16.9 × 15 =
  17. 17.27 × 15 =
  18. 18.41 × 15 =
  19. 19.21 × 15 =
  20. 20.43 × 15 =
  21. 21.11 × 15 =
  22. 22.35 × 15 =
  23. 23.34 × 15 =
  24. 24.42 × 15 =
  25. 25.40 × 15 =
  26. 26.45 × 15 =
  27. 27.5 × 15 =
  28. 28.13 × 15 =
  29. 29.18 × 15 =
  30. 30.13 × 15 =
  31. 31.8 × 15 =
  32. 32.15 × 15 =
  33. 33.34 × 15 =
  34. 34.55 × 15 =
  35. 35.34 × 15 =
  36. 36.57 × 15 =
  37. 37.61 × 15 =
  38. 38.60 × 15 =
  39. 39.18 × 15 =
  40. 40.21 × 15 =

Answer key

  1. 180
  2. 570
  3. 375
  4. 570
  5. 210
  6. 915
  7. 660
  8. 180
  9. 225
  10. 735
  11. 285
  12. 810
  13. 720
  14. 315
  15. 690
  16. 135
  17. 405
  18. 615
  19. 315
  20. 645
  21. 165
  22. 525
  23. 510
  24. 630
  25. 600
  26. 675
  27. 75
  28. 195
  29. 270
  30. 195
  31. 120
  32. 225
  33. 510
  34. 825
  35. 510
  36. 855
  37. 915
  38. 900
  39. 270
  40. 315

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