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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 920 · 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. 1.45 × 6 =
  2. 2.18 × 75 =
  3. 3.14 × 25 =
  4. 4.36 × 75 =
  5. 5.12 × 45 =
  6. 6.25 × 24 =
  7. 7.125 × 10 =
  8. 8.45 × 20 =
  9. 9.15 × 8 =
  10. 10.55 × 8 =
  11. 11.16 × 75 =
  12. 12.6 × 15 =
  13. 13.35 × 10 =
  14. 14.25 × 22 =
  15. 15.25 × 34 =
  16. 16.45 × 10 =
  17. 17.20 × 15 =
  18. 18.45 × 6 =
  19. 19.6 × 25 =
  20. 20.55 × 30 =
  21. 21.55 × 36 =
  22. 22.55 × 12 =
  23. 23.125 × 26 =
  24. 24.125 × 6 =
  25. 25.75 × 32 =
  26. 26.35 × 24 =
  27. 27.8 × 65 =
  28. 28.45 × 18 =
  29. 29.30 × 35 =
  30. 30.26 × 65 =
  31. 31.12 × 125 =
  32. 32.125 × 14 =
  33. 33.20 × 75 =
  34. 34.55 × 24 =
  35. 35.8 × 45 =
  36. 36.20 × 25 =
  37. 37.125 × 40 =
  38. 38.14 × 25 =
  39. 39.55 × 10 =
  40. 40.65 × 24 =

Answer key

  1. 270
  2. 1350
  3. 350
  4. 2700
  5. 540
  6. 600
  7. 1250
  8. 900
  9. 120
  10. 440
  11. 1200
  12. 90
  13. 350
  14. 550
  15. 850
  16. 450
  17. 300
  18. 270
  19. 150
  20. 1650
  21. 1980
  22. 660
  23. 3250
  24. 750
  25. 2400
  26. 840
  27. 520
  28. 810
  29. 1050
  30. 1690
  31. 1500
  32. 1750
  33. 1500
  34. 1320
  35. 360
  36. 500
  37. 5000
  38. 350
  39. 550
  40. 1560

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