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Multiply by 15 Worksheet

Speed calculation lesson 8: × 15: ten plus half · Set 639 · 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. 2.45 × 15 =
  3. 3.32 × 15 =
  4. 4.63 × 15 =
  5. 5.32 × 15 =
  6. 6.57 × 15 =
  7. 7.9 × 15 =
  8. 8.52 × 15 =
  9. 9.59 × 15 =
  10. 10.32 × 15 =
  11. 11.34 × 15 =
  12. 12.55 × 15 =
  13. 13.38 × 15 =
  14. 14.50 × 15 =
  15. 15.6 × 15 =
  16. 16.53 × 15 =
  17. 17.16 × 15 =
  18. 18.17 × 15 =
  19. 19.13 × 15 =
  20. 20.52 × 15 =
  21. 21.13 × 15 =
  22. 22.30 × 15 =
  23. 23.42 × 15 =
  24. 24.7 × 15 =
  25. 25.42 × 15 =
  26. 26.42 × 15 =
  27. 27.26 × 15 =
  28. 28.22 × 15 =
  29. 29.58 × 15 =
  30. 30.9 × 15 =
  31. 31.17 × 15 =
  32. 32.22 × 15 =
  33. 33.39 × 15 =
  34. 34.41 × 15 =
  35. 35.41 × 15 =
  36. 36.34 × 15 =
  37. 37.8 × 15 =
  38. 38.45 × 15 =
  39. 39.40 × 15 =
  40. 40.5 × 15 =

Answer key

  1. 690
  2. 675
  3. 480
  4. 945
  5. 480
  6. 855
  7. 135
  8. 780
  9. 885
  10. 480
  11. 510
  12. 825
  13. 570
  14. 750
  15. 90
  16. 795
  17. 240
  18. 255
  19. 195
  20. 780
  21. 195
  22. 450
  23. 630
  24. 105
  25. 630
  26. 630
  27. 390
  28. 330
  29. 870
  30. 135
  31. 255
  32. 330
  33. 585
  34. 615
  35. 615
  36. 510
  37. 120
  38. 675
  39. 600
  40. 75

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