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Multiply by 15 Worksheet

Speed calculation lesson 8: × 15: ten plus half · Set 861 · 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. 1.58 × 15 =
  2. 2.5 × 15 =
  3. 3.49 × 15 =
  4. 4.33 × 15 =
  5. 5.61 × 15 =
  6. 6.20 × 15 =
  7. 7.11 × 15 =
  8. 8.28 × 15 =
  9. 9.7 × 15 =
  10. 10.19 × 15 =
  11. 11.20 × 15 =
  12. 12.40 × 15 =
  13. 13.5 × 15 =
  14. 14.12 × 15 =
  15. 15.56 × 15 =
  16. 16.42 × 15 =
  17. 17.46 × 15 =
  18. 18.47 × 15 =
  19. 19.21 × 15 =
  20. 20.19 × 15 =
  21. 21.8 × 15 =
  22. 22.28 × 15 =
  23. 23.10 × 15 =
  24. 24.53 × 15 =
  25. 25.30 × 15 =
  26. 26.23 × 15 =
  27. 27.15 × 15 =
  28. 28.28 × 15 =
  29. 29.57 × 15 =
  30. 30.9 × 15 =
  31. 31.24 × 15 =
  32. 32.21 × 15 =
  33. 33.16 × 15 =
  34. 34.22 × 15 =
  35. 35.45 × 15 =
  36. 36.36 × 15 =
  37. 37.29 × 15 =
  38. 38.38 × 15 =
  39. 39.44 × 15 =
  40. 40.45 × 15 =

Answer key

  1. 870
  2. 75
  3. 735
  4. 495
  5. 915
  6. 300
  7. 165
  8. 420
  9. 105
  10. 285
  11. 300
  12. 600
  13. 75
  14. 180
  15. 840
  16. 630
  17. 690
  18. 705
  19. 315
  20. 285
  21. 120
  22. 420
  23. 150
  24. 795
  25. 450
  26. 345
  27. 225
  28. 420
  29. 855
  30. 135
  31. 360
  32. 315
  33. 240
  34. 330
  35. 675
  36. 540
  37. 435
  38. 570
  39. 660
  40. 675

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