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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 877 · 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 × 24 =
  2. 2.10 × 15 =
  3. 3.12 × 65 =
  4. 4.15 × 8 =
  5. 5.25 × 40 =
  6. 6.25 × 14 =
  7. 7.8 × 45 =
  8. 8.26 × 75 =
  9. 9.25 × 12 =
  10. 10.20 × 15 =
  11. 11.34 × 45 =
  12. 12.12 × 125 =
  13. 13.65 × 26 =
  14. 14.45 × 8 =
  15. 15.125 × 24 =
  16. 16.22 × 75 =
  17. 17.16 × 75 =
  18. 18.22 × 25 =
  19. 19.125 × 38 =
  20. 20.65 × 12 =
  21. 21.10 × 35 =
  22. 22.34 × 35 =
  23. 23.36 × 75 =
  24. 24.18 × 15 =
  25. 25.30 × 55 =
  26. 26.40 × 125 =
  27. 27.40 × 65 =
  28. 28.30 × 35 =
  29. 29.30 × 65 =
  30. 30.65 × 24 =
  31. 31.40 × 75 =
  32. 32.55 × 40 =
  33. 33.26 × 45 =
  34. 34.45 × 24 =
  35. 35.8 × 25 =
  36. 36.14 × 125 =
  37. 37.15 × 38 =
  38. 38.125 × 38 =
  39. 39.30 × 55 =
  40. 40.16 × 65 =

Answer key

  1. 1800
  2. 150
  3. 780
  4. 120
  5. 1000
  6. 350
  7. 360
  8. 1950
  9. 300
  10. 300
  11. 1530
  12. 1500
  13. 1690
  14. 360
  15. 3000
  16. 1650
  17. 1200
  18. 550
  19. 4750
  20. 780
  21. 350
  22. 1190
  23. 2700
  24. 270
  25. 1650
  26. 5000
  27. 2600
  28. 1050
  29. 1950
  30. 1560
  31. 3000
  32. 2200
  33. 1170
  34. 1080
  35. 200
  36. 1750
  37. 570
  38. 4750
  39. 1650
  40. 1040

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