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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 899 · 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. 1.12 × 125 =
  2. 2.26 × 45 =
  3. 3.10 × 35 =
  4. 4.6 × 45 =
  5. 5.75 × 38 =
  6. 6.75 × 24 =
  7. 7.6 × 125 =
  8. 8.35 × 22 =
  9. 9.20 × 55 =
  10. 10.16 × 45 =
  11. 11.45 × 22 =
  12. 12.8 × 125 =
  13. 13.35 × 8 =
  14. 14.55 × 28 =
  15. 15.34 × 35 =
  16. 16.40 × 75 =
  17. 17.65 × 12 =
  18. 18.6 × 25 =
  19. 19.125 × 14 =
  20. 20.36 × 25 =
  21. 21.45 × 12 =
  22. 22.8 × 35 =
  23. 23.65 × 38 =
  24. 24.35 × 32 =
  25. 25.24 × 15 =
  26. 26.26 × 125 =
  27. 27.14 × 125 =
  28. 28.32 × 15 =
  29. 29.55 × 10 =
  30. 30.10 × 25 =
  31. 31.6 × 15 =
  32. 32.28 × 75 =
  33. 33.26 × 25 =
  34. 34.10 × 35 =
  35. 35.6 × 125 =
  36. 36.35 × 32 =
  37. 37.25 × 34 =
  38. 38.75 × 8 =
  39. 39.6 × 55 =
  40. 40.32 × 125 =

Answer key

  1. 1500
  2. 1170
  3. 350
  4. 270
  5. 2850
  6. 1800
  7. 750
  8. 770
  9. 1100
  10. 720
  11. 990
  12. 1000
  13. 280
  14. 1540
  15. 1190
  16. 3000
  17. 780
  18. 150
  19. 1750
  20. 900
  21. 540
  22. 280
  23. 2470
  24. 1120
  25. 360
  26. 3250
  27. 1750
  28. 480
  29. 550
  30. 250
  31. 90
  32. 2100
  33. 650
  34. 350
  35. 750
  36. 1120
  37. 850
  38. 600
  39. 330
  40. 4000

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