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Multiply by 15 Worksheet

Speed calculation lesson 8: × 15: ten plus half · Set 989 · 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. 1.12 × 15 =
  2. 2.10 × 15 =
  3. 3.61 × 15 =
  4. 4.61 × 15 =
  5. 5.50 × 15 =
  6. 6.35 × 15 =
  7. 7.4 × 15 =
  8. 8.58 × 15 =
  9. 9.59 × 15 =
  10. 10.12 × 15 =
  11. 11.38 × 15 =
  12. 12.59 × 15 =
  13. 13.20 × 15 =
  14. 14.25 × 15 =
  15. 15.7 × 15 =
  16. 16.6 × 15 =
  17. 17.62 × 15 =
  18. 18.47 × 15 =
  19. 19.17 × 15 =
  20. 20.58 × 15 =
  21. 21.56 × 15 =
  22. 22.47 × 15 =
  23. 23.30 × 15 =
  24. 24.45 × 15 =
  25. 25.14 × 15 =
  26. 26.46 × 15 =
  27. 27.18 × 15 =
  28. 28.54 × 15 =
  29. 29.58 × 15 =
  30. 30.43 × 15 =
  31. 31.13 × 15 =
  32. 32.35 × 15 =
  33. 33.18 × 15 =
  34. 34.58 × 15 =
  35. 35.16 × 15 =
  36. 36.10 × 15 =
  37. 37.19 × 15 =
  38. 38.57 × 15 =
  39. 39.37 × 15 =
  40. 40.5 × 15 =

Answer key

  1. 180
  2. 150
  3. 915
  4. 915
  5. 750
  6. 525
  7. 60
  8. 870
  9. 885
  10. 180
  11. 570
  12. 885
  13. 300
  14. 375
  15. 105
  16. 90
  17. 930
  18. 705
  19. 255
  20. 870
  21. 840
  22. 705
  23. 450
  24. 675
  25. 210
  26. 690
  27. 270
  28. 810
  29. 870
  30. 645
  31. 195
  32. 525
  33. 270
  34. 870
  35. 240
  36. 150
  37. 285
  38. 855
  39. 555
  40. 75

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