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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 900 · 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. 1.75 × 8 =
  2. 2.125 × 28 =
  3. 3.18 × 35 =
  4. 4.125 × 16 =
  5. 5.75 × 14 =
  6. 6.25 × 34 =
  7. 7.15 × 20 =
  8. 8.45 × 8 =
  9. 9.15 × 34 =
  10. 10.14 × 45 =
  11. 11.38 × 25 =
  12. 12.55 × 16 =
  13. 13.40 × 75 =
  14. 14.36 × 125 =
  15. 15.65 × 24 =
  16. 16.8 × 15 =
  17. 17.15 × 28 =
  18. 18.32 × 15 =
  19. 19.25 × 10 =
  20. 20.12 × 45 =
  21. 21.24 × 45 =
  22. 22.75 × 6 =
  23. 23.75 × 20 =
  24. 24.35 × 8 =
  25. 25.6 × 25 =
  26. 26.6 × 125 =
  27. 27.6 × 15 =
  28. 28.25 × 24 =
  29. 29.55 × 40 =
  30. 30.15 × 6 =
  31. 31.12 × 45 =
  32. 32.28 × 35 =
  33. 33.22 × 25 =
  34. 34.35 × 34 =
  35. 35.14 × 65 =
  36. 36.40 × 65 =
  37. 37.6 × 15 =
  38. 38.35 × 12 =
  39. 39.26 × 35 =
  40. 40.36 × 75 =

Answer key

  1. 600
  2. 3500
  3. 630
  4. 2000
  5. 1050
  6. 850
  7. 300
  8. 360
  9. 510
  10. 630
  11. 950
  12. 880
  13. 3000
  14. 4500
  15. 1560
  16. 120
  17. 420
  18. 480
  19. 250
  20. 540
  21. 1080
  22. 450
  23. 1500
  24. 280
  25. 150
  26. 750
  27. 90
  28. 600
  29. 2200
  30. 90
  31. 540
  32. 980
  33. 550
  34. 1190
  35. 910
  36. 2600
  37. 90
  38. 420
  39. 910
  40. 2700

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