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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 854 · 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. 1.65 × 14 =
  2. 2.45 × 10 =
  3. 3.25 × 40 =
  4. 4.75 × 38 =
  5. 5.15 × 40 =
  6. 6.6 × 35 =
  7. 7.25 × 38 =
  8. 8.125 × 26 =
  9. 9.40 × 65 =
  10. 10.35 × 30 =
  11. 11.75 × 20 =
  12. 12.125 × 26 =
  13. 13.15 × 40 =
  14. 14.125 × 30 =
  15. 15.15 × 12 =
  16. 16.35 × 28 =
  17. 17.45 × 40 =
  18. 18.35 × 26 =
  19. 19.35 × 12 =
  20. 20.25 × 8 =
  21. 21.65 × 26 =
  22. 22.6 × 75 =
  23. 23.26 × 75 =
  24. 24.8 × 35 =
  25. 25.18 × 125 =
  26. 26.65 × 30 =
  27. 27.8 × 55 =
  28. 28.75 × 36 =
  29. 29.34 × 125 =
  30. 30.28 × 55 =
  31. 31.125 × 22 =
  32. 32.15 × 8 =
  33. 33.14 × 65 =
  34. 34.45 × 24 =
  35. 35.25 × 34 =
  36. 36.125 × 22 =
  37. 37.65 × 26 =
  38. 38.20 × 55 =
  39. 39.25 × 10 =
  40. 40.75 × 14 =

Answer key

  1. 910
  2. 450
  3. 1000
  4. 2850
  5. 600
  6. 210
  7. 950
  8. 3250
  9. 2600
  10. 1050
  11. 1500
  12. 3250
  13. 600
  14. 3750
  15. 180
  16. 980
  17. 1800
  18. 910
  19. 420
  20. 200
  21. 1690
  22. 450
  23. 1950
  24. 280
  25. 2250
  26. 1950
  27. 440
  28. 2700
  29. 4250
  30. 1540
  31. 2750
  32. 120
  33. 910
  34. 1080
  35. 850
  36. 2750
  37. 1690
  38. 1100
  39. 250
  40. 1050

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