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Multiply by 15 Worksheet

Speed calculation lesson 8: × 15: ten plus half · Set 924 · 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. 1.36 × 15 =
  2. 2.58 × 15 =
  3. 3.21 × 15 =
  4. 4.54 × 15 =
  5. 5.33 × 15 =
  6. 6.47 × 15 =
  7. 7.57 × 15 =
  8. 8.42 × 15 =
  9. 9.47 × 15 =
  10. 10.39 × 15 =
  11. 11.62 × 15 =
  12. 12.20 × 15 =
  13. 13.27 × 15 =
  14. 14.39 × 15 =
  15. 15.7 × 15 =
  16. 16.24 × 15 =
  17. 17.44 × 15 =
  18. 18.35 × 15 =
  19. 19.43 × 15 =
  20. 20.38 × 15 =
  21. 21.24 × 15 =
  22. 22.53 × 15 =
  23. 23.34 × 15 =
  24. 24.35 × 15 =
  25. 25.31 × 15 =
  26. 26.21 × 15 =
  27. 27.11 × 15 =
  28. 28.40 × 15 =
  29. 29.21 × 15 =
  30. 30.15 × 15 =
  31. 31.52 × 15 =
  32. 32.58 × 15 =
  33. 33.24 × 15 =
  34. 34.46 × 15 =
  35. 35.9 × 15 =
  36. 36.42 × 15 =
  37. 37.44 × 15 =
  38. 38.62 × 15 =
  39. 39.57 × 15 =
  40. 40.45 × 15 =

Answer key

  1. 540
  2. 870
  3. 315
  4. 810
  5. 495
  6. 705
  7. 855
  8. 630
  9. 705
  10. 585
  11. 930
  12. 300
  13. 405
  14. 585
  15. 105
  16. 360
  17. 660
  18. 525
  19. 645
  20. 570
  21. 360
  22. 795
  23. 510
  24. 525
  25. 465
  26. 315
  27. 165
  28. 600
  29. 315
  30. 225
  31. 780
  32. 870
  33. 360
  34. 690
  35. 135
  36. 630
  37. 660
  38. 930
  39. 855
  40. 675

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