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Multiply by 15 Worksheet

Speed calculation lesson 8: × 15: ten plus half · Set 649 · 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. 2.23 × 15 =
  3. 3.30 × 15 =
  4. 4.6 × 15 =
  5. 5.9 × 15 =
  6. 6.26 × 15 =
  7. 7.24 × 15 =
  8. 8.59 × 15 =
  9. 9.50 × 15 =
  10. 10.16 × 15 =
  11. 11.55 × 15 =
  12. 12.59 × 15 =
  13. 13.43 × 15 =
  14. 14.27 × 15 =
  15. 15.5 × 15 =
  16. 16.12 × 15 =
  17. 17.61 × 15 =
  18. 18.6 × 15 =
  19. 19.23 × 15 =
  20. 20.10 × 15 =
  21. 21.37 × 15 =
  22. 22.16 × 15 =
  23. 23.40 × 15 =
  24. 24.43 × 15 =
  25. 25.18 × 15 =
  26. 26.35 × 15 =
  27. 27.10 × 15 =
  28. 28.19 × 15 =
  29. 29.47 × 15 =
  30. 30.55 × 15 =
  31. 31.28 × 15 =
  32. 32.34 × 15 =
  33. 33.17 × 15 =
  34. 34.53 × 15 =
  35. 35.58 × 15 =
  36. 36.15 × 15 =
  37. 37.57 × 15 =
  38. 38.31 × 15 =
  39. 39.5 × 15 =
  40. 40.40 × 15 =

Answer key

  1. 690
  2. 345
  3. 450
  4. 90
  5. 135
  6. 390
  7. 360
  8. 885
  9. 750
  10. 240
  11. 825
  12. 885
  13. 645
  14. 405
  15. 75
  16. 180
  17. 915
  18. 90
  19. 345
  20. 150
  21. 555
  22. 240
  23. 600
  24. 645
  25. 270
  26. 525
  27. 150
  28. 285
  29. 705
  30. 825
  31. 420
  32. 510
  33. 255
  34. 795
  35. 870
  36. 225
  37. 855
  38. 465
  39. 75
  40. 600

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