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Multiply by 15 Worksheet

Speed calculation lesson 8: × 15: ten plus half · Set 886 · 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. 1.11 × 15 =
  2. 2.61 × 15 =
  3. 3.57 × 15 =
  4. 4.43 × 15 =
  5. 5.45 × 15 =
  6. 6.9 × 15 =
  7. 7.19 × 15 =
  8. 8.64 × 15 =
  9. 9.31 × 15 =
  10. 10.36 × 15 =
  11. 11.44 × 15 =
  12. 12.6 × 15 =
  13. 13.40 × 15 =
  14. 14.27 × 15 =
  15. 15.36 × 15 =
  16. 16.39 × 15 =
  17. 17.42 × 15 =
  18. 18.54 × 15 =
  19. 19.19 × 15 =
  20. 20.37 × 15 =
  21. 21.33 × 15 =
  22. 22.58 × 15 =
  23. 23.21 × 15 =
  24. 24.56 × 15 =
  25. 25.21 × 15 =
  26. 26.17 × 15 =
  27. 27.12 × 15 =
  28. 28.46 × 15 =
  29. 29.30 × 15 =
  30. 30.62 × 15 =
  31. 31.16 × 15 =
  32. 32.40 × 15 =
  33. 33.19 × 15 =
  34. 34.42 × 15 =
  35. 35.26 × 15 =
  36. 36.6 × 15 =
  37. 37.22 × 15 =
  38. 38.62 × 15 =
  39. 39.53 × 15 =
  40. 40.15 × 15 =

Answer key

  1. 165
  2. 915
  3. 855
  4. 645
  5. 675
  6. 135
  7. 285
  8. 960
  9. 465
  10. 540
  11. 660
  12. 90
  13. 600
  14. 405
  15. 540
  16. 585
  17. 630
  18. 810
  19. 285
  20. 555
  21. 495
  22. 870
  23. 315
  24. 840
  25. 315
  26. 255
  27. 180
  28. 690
  29. 450
  30. 930
  31. 240
  32. 600
  33. 285
  34. 630
  35. 390
  36. 90
  37. 330
  38. 930
  39. 795
  40. 225

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