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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 951 · 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. 1.24 × 25 =
  2. 2.65 × 30 =
  3. 3.45 × 34 =
  4. 4.45 × 24 =
  5. 5.25 × 6 =
  6. 6.8 × 45 =
  7. 7.24 × 75 =
  8. 8.35 × 6 =
  9. 9.35 × 14 =
  10. 10.125 × 34 =
  11. 11.125 × 6 =
  12. 12.65 × 32 =
  13. 13.45 × 22 =
  14. 14.36 × 15 =
  15. 15.22 × 25 =
  16. 16.40 × 125 =
  17. 17.75 × 10 =
  18. 18.22 × 65 =
  19. 19.125 × 22 =
  20. 20.35 × 26 =
  21. 21.18 × 75 =
  22. 22.6 × 45 =
  23. 23.32 × 15 =
  24. 24.18 × 65 =
  25. 25.55 × 10 =
  26. 26.45 × 16 =
  27. 27.45 × 8 =
  28. 28.16 × 15 =
  29. 29.35 × 30 =
  30. 30.35 × 20 =
  31. 31.25 × 38 =
  32. 32.8 × 15 =
  33. 33.20 × 125 =
  34. 34.34 × 65 =
  35. 35.45 × 16 =
  36. 36.18 × 125 =
  37. 37.35 × 34 =
  38. 38.25 × 28 =
  39. 39.20 × 55 =
  40. 40.125 × 6 =

Answer key

  1. 600
  2. 1950
  3. 1530
  4. 1080
  5. 150
  6. 360
  7. 1800
  8. 210
  9. 490
  10. 4250
  11. 750
  12. 2080
  13. 990
  14. 540
  15. 550
  16. 5000
  17. 750
  18. 1430
  19. 2750
  20. 910
  21. 1350
  22. 270
  23. 480
  24. 1170
  25. 550
  26. 720
  27. 360
  28. 240
  29. 1050
  30. 700
  31. 950
  32. 120
  33. 2500
  34. 2210
  35. 720
  36. 2250
  37. 1190
  38. 700
  39. 1100
  40. 750

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