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Multiply by 15 Worksheet

Speed calculation lesson 8: × 15: ten plus half · Set 978 · 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. 1.56 × 15 =
  2. 2.25 × 15 =
  3. 3.19 × 15 =
  4. 4.48 × 15 =
  5. 5.35 × 15 =
  6. 6.58 × 15 =
  7. 7.20 × 15 =
  8. 8.40 × 15 =
  9. 9.46 × 15 =
  10. 10.45 × 15 =
  11. 11.25 × 15 =
  12. 12.16 × 15 =
  13. 13.7 × 15 =
  14. 14.34 × 15 =
  15. 15.62 × 15 =
  16. 16.11 × 15 =
  17. 17.34 × 15 =
  18. 18.54 × 15 =
  19. 19.11 × 15 =
  20. 20.41 × 15 =
  21. 21.56 × 15 =
  22. 22.21 × 15 =
  23. 23.5 × 15 =
  24. 24.29 × 15 =
  25. 25.24 × 15 =
  26. 26.59 × 15 =
  27. 27.50 × 15 =
  28. 28.54 × 15 =
  29. 29.54 × 15 =
  30. 30.55 × 15 =
  31. 31.31 × 15 =
  32. 32.25 × 15 =
  33. 33.13 × 15 =
  34. 34.5 × 15 =
  35. 35.46 × 15 =
  36. 36.38 × 15 =
  37. 37.34 × 15 =
  38. 38.43 × 15 =
  39. 39.36 × 15 =
  40. 40.35 × 15 =

Answer key

  1. 840
  2. 375
  3. 285
  4. 720
  5. 525
  6. 870
  7. 300
  8. 600
  9. 690
  10. 675
  11. 375
  12. 240
  13. 105
  14. 510
  15. 930
  16. 165
  17. 510
  18. 810
  19. 165
  20. 615
  21. 840
  22. 315
  23. 75
  24. 435
  25. 360
  26. 885
  27. 750
  28. 810
  29. 810
  30. 825
  31. 465
  32. 375
  33. 195
  34. 75
  35. 690
  36. 570
  37. 510
  38. 645
  39. 540
  40. 525

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