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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 866 · 40 questions
TalentJR

How it works (Double and halve): Find the number ending in 5 and the even number. Double the one ending in 5; halve the even one. Repeat while it helps (25 → 50 → 100), then multiply.

NameDateTime takenScore ___ / 40
  1. 1.14 × 15 =
  2. 2.75 × 12 =
  3. 3.38 × 75 =
  4. 4.25 × 24 =
  5. 5.25 × 34 =
  6. 6.65 × 28 =
  7. 7.26 × 25 =
  8. 8.22 × 55 =
  9. 9.65 × 18 =
  10. 10.14 × 65 =
  11. 11.75 × 10 =
  12. 12.15 × 6 =
  13. 13.15 × 36 =
  14. 14.22 × 125 =
  15. 15.22 × 25 =
  16. 16.65 × 20 =
  17. 17.10 × 65 =
  18. 18.125 × 30 =
  19. 19.55 × 32 =
  20. 20.14 × 35 =
  21. 21.25 × 32 =
  22. 22.75 × 8 =
  23. 23.45 × 26 =
  24. 24.25 × 14 =
  25. 25.125 × 14 =
  26. 26.25 × 12 =
  27. 27.6 × 55 =
  28. 28.26 × 75 =
  29. 29.65 × 20 =
  30. 30.10 × 35 =
  31. 31.35 × 40 =
  32. 32.65 × 16 =
  33. 33.25 × 28 =
  34. 34.38 × 45 =
  35. 35.14 × 75 =
  36. 36.55 × 14 =
  37. 37.26 × 35 =
  38. 38.65 × 14 =
  39. 39.35 × 32 =
  40. 40.24 × 35 =

Answer key

  1. 210
  2. 900
  3. 2850
  4. 600
  5. 850
  6. 1820
  7. 650
  8. 1210
  9. 1170
  10. 910
  11. 750
  12. 90
  13. 540
  14. 2750
  15. 550
  16. 1300
  17. 650
  18. 3750
  19. 1760
  20. 490
  21. 800
  22. 600
  23. 1170
  24. 350
  25. 1750
  26. 300
  27. 330
  28. 1950
  29. 1300
  30. 350
  31. 1400
  32. 1040
  33. 700
  34. 1710
  35. 1050
  36. 770
  37. 910
  38. 910
  39. 1120
  40. 840

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