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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 847 · 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. 1.55 × 32 =
  2. 2.16 × 35 =
  3. 3.15 × 40 =
  4. 4.28 × 25 =
  5. 5.32 × 45 =
  6. 6.15 × 22 =
  7. 7.35 × 10 =
  8. 8.8 × 35 =
  9. 9.65 × 6 =
  10. 10.26 × 55 =
  11. 11.28 × 45 =
  12. 12.75 × 32 =
  13. 13.45 × 6 =
  14. 14.22 × 45 =
  15. 15.25 × 8 =
  16. 16.28 × 15 =
  17. 17.45 × 38 =
  18. 18.55 × 6 =
  19. 19.26 × 55 =
  20. 20.26 × 65 =
  21. 21.32 × 15 =
  22. 22.40 × 65 =
  23. 23.20 × 15 =
  24. 24.6 × 15 =
  25. 25.125 × 28 =
  26. 26.38 × 65 =
  27. 27.28 × 35 =
  28. 28.34 × 55 =
  29. 29.75 × 38 =
  30. 30.40 × 65 =
  31. 31.18 × 35 =
  32. 32.8 × 45 =
  33. 33.40 × 125 =
  34. 34.45 × 14 =
  35. 35.14 × 75 =
  36. 36.75 × 8 =
  37. 37.6 × 25 =
  38. 38.15 × 26 =
  39. 39.35 × 26 =
  40. 40.30 × 35 =

Answer key

  1. 1760
  2. 560
  3. 600
  4. 700
  5. 1440
  6. 330
  7. 350
  8. 280
  9. 390
  10. 1430
  11. 1260
  12. 2400
  13. 270
  14. 990
  15. 200
  16. 420
  17. 1710
  18. 330
  19. 1430
  20. 1690
  21. 480
  22. 2600
  23. 300
  24. 90
  25. 3500
  26. 2470
  27. 980
  28. 1870
  29. 2850
  30. 2600
  31. 630
  32. 360
  33. 5000
  34. 630
  35. 1050
  36. 600
  37. 150
  38. 390
  39. 910
  40. 1050

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