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Multiply by 15 Worksheet

Speed calculation lesson 8: × 15: ten plus half · Set 536 · 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. 1.56 × 15 =
  2. 2.50 × 15 =
  3. 3.50 × 15 =
  4. 4.29 × 15 =
  5. 5.10 × 15 =
  6. 6.10 × 15 =
  7. 7.18 × 15 =
  8. 8.21 × 15 =
  9. 9.6 × 15 =
  10. 10.35 × 15 =
  11. 11.12 × 15 =
  12. 12.12 × 15 =
  13. 13.28 × 15 =
  14. 14.57 × 15 =
  15. 15.6 × 15 =
  16. 16.34 × 15 =
  17. 17.16 × 15 =
  18. 18.46 × 15 =
  19. 19.36 × 15 =
  20. 20.19 × 15 =
  21. 21.24 × 15 =
  22. 22.12 × 15 =
  23. 23.39 × 15 =
  24. 24.54 × 15 =
  25. 25.44 × 15 =
  26. 26.20 × 15 =
  27. 27.11 × 15 =
  28. 28.16 × 15 =
  29. 29.5 × 15 =
  30. 30.18 × 15 =
  31. 31.58 × 15 =
  32. 32.6 × 15 =
  33. 33.40 × 15 =
  34. 34.49 × 15 =
  35. 35.29 × 15 =
  36. 36.45 × 15 =
  37. 37.6 × 15 =
  38. 38.43 × 15 =
  39. 39.44 × 15 =
  40. 40.56 × 15 =

Answer key

  1. 840
  2. 750
  3. 750
  4. 435
  5. 150
  6. 150
  7. 270
  8. 315
  9. 90
  10. 525
  11. 180
  12. 180
  13. 420
  14. 855
  15. 90
  16. 510
  17. 240
  18. 690
  19. 540
  20. 285
  21. 360
  22. 180
  23. 585
  24. 810
  25. 660
  26. 300
  27. 165
  28. 240
  29. 75
  30. 270
  31. 870
  32. 90
  33. 600
  34. 735
  35. 435
  36. 675
  37. 90
  38. 645
  39. 660
  40. 840

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