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Multiply by 15 Worksheet

Speed calculation lesson 8: × 15: ten plus half · Set 552 · 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. 1.47 × 15 =
  2. 2.42 × 15 =
  3. 3.20 × 15 =
  4. 4.30 × 15 =
  5. 5.29 × 15 =
  6. 6.24 × 15 =
  7. 7.27 × 15 =
  8. 8.18 × 15 =
  9. 9.10 × 15 =
  10. 10.14 × 15 =
  11. 11.54 × 15 =
  12. 12.6 × 15 =
  13. 13.16 × 15 =
  14. 14.15 × 15 =
  15. 15.25 × 15 =
  16. 16.9 × 15 =
  17. 17.50 × 15 =
  18. 18.37 × 15 =
  19. 19.7 × 15 =
  20. 20.36 × 15 =
  21. 21.9 × 15 =
  22. 22.46 × 15 =
  23. 23.14 × 15 =
  24. 24.61 × 15 =
  25. 25.23 × 15 =
  26. 26.46 × 15 =
  27. 27.47 × 15 =
  28. 28.23 × 15 =
  29. 29.56 × 15 =
  30. 30.37 × 15 =
  31. 31.17 × 15 =
  32. 32.25 × 15 =
  33. 33.42 × 15 =
  34. 34.36 × 15 =
  35. 35.45 × 15 =
  36. 36.38 × 15 =
  37. 37.49 × 15 =
  38. 38.10 × 15 =
  39. 39.30 × 15 =
  40. 40.63 × 15 =

Answer key

  1. 705
  2. 630
  3. 300
  4. 450
  5. 435
  6. 360
  7. 405
  8. 270
  9. 150
  10. 210
  11. 810
  12. 90
  13. 240
  14. 225
  15. 375
  16. 135
  17. 750
  18. 555
  19. 105
  20. 540
  21. 135
  22. 690
  23. 210
  24. 915
  25. 345
  26. 690
  27. 705
  28. 345
  29. 840
  30. 555
  31. 255
  32. 375
  33. 630
  34. 540
  35. 675
  36. 570
  37. 735
  38. 150
  39. 450
  40. 945

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