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Multiply by 15 Worksheet

Speed calculation lesson 8: × 15: ten plus half · Set 305 · 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. 1.20 × 15 =
  2. 2.16 × 15 =
  3. 3.12 × 15 =
  4. 4.21 × 15 =
  5. 5.56 × 15 =
  6. 6.18 × 15 =
  7. 7.58 × 15 =
  8. 8.35 × 15 =
  9. 9.6 × 15 =
  10. 10.62 × 15 =
  11. 11.55 × 15 =
  12. 12.58 × 15 =
  13. 13.37 × 15 =
  14. 14.45 × 15 =
  15. 15.62 × 15 =
  16. 16.54 × 15 =
  17. 17.40 × 15 =
  18. 18.52 × 15 =
  19. 19.12 × 15 =
  20. 20.34 × 15 =
  21. 21.11 × 15 =
  22. 22.13 × 15 =
  23. 23.51 × 15 =
  24. 24.11 × 15 =
  25. 25.21 × 15 =
  26. 26.53 × 15 =
  27. 27.34 × 15 =
  28. 28.18 × 15 =
  29. 29.40 × 15 =
  30. 30.21 × 15 =
  31. 31.35 × 15 =
  32. 32.60 × 15 =
  33. 33.57 × 15 =
  34. 34.20 × 15 =
  35. 35.63 × 15 =
  36. 36.30 × 15 =
  37. 37.61 × 15 =
  38. 38.37 × 15 =
  39. 39.19 × 15 =
  40. 40.44 × 15 =

Answer key

  1. 300
  2. 240
  3. 180
  4. 315
  5. 840
  6. 270
  7. 870
  8. 525
  9. 90
  10. 930
  11. 825
  12. 870
  13. 555
  14. 675
  15. 930
  16. 810
  17. 600
  18. 780
  19. 180
  20. 510
  21. 165
  22. 195
  23. 765
  24. 165
  25. 315
  26. 795
  27. 510
  28. 270
  29. 600
  30. 315
  31. 525
  32. 900
  33. 855
  34. 300
  35. 945
  36. 450
  37. 915
  38. 555
  39. 285
  40. 660

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