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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 911 · 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. 1.125 × 32 =
  2. 2.15 × 40 =
  3. 3.45 × 8 =
  4. 4.36 × 35 =
  5. 5.35 × 30 =
  6. 6.75 × 20 =
  7. 7.45 × 38 =
  8. 8.30 × 45 =
  9. 9.34 × 45 =
  10. 10.35 × 20 =
  11. 11.12 × 35 =
  12. 12.45 × 30 =
  13. 13.36 × 25 =
  14. 14.20 × 65 =
  15. 15.34 × 55 =
  16. 16.40 × 25 =
  17. 17.55 × 8 =
  18. 18.25 × 30 =
  19. 19.12 × 15 =
  20. 20.125 × 36 =
  21. 21.35 × 28 =
  22. 22.15 × 8 =
  23. 23.36 × 75 =
  24. 24.32 × 35 =
  25. 25.35 × 40 =
  26. 26.15 × 34 =
  27. 27.15 × 8 =
  28. 28.125 × 24 =
  29. 29.34 × 55 =
  30. 30.25 × 10 =
  31. 31.24 × 25 =
  32. 32.15 × 36 =
  33. 33.40 × 125 =
  34. 34.12 × 75 =
  35. 35.75 × 20 =
  36. 36.20 × 45 =
  37. 37.65 × 22 =
  38. 38.125 × 8 =
  39. 39.25 × 6 =
  40. 40.14 × 45 =

Answer key

  1. 4000
  2. 600
  3. 360
  4. 1260
  5. 1050
  6. 1500
  7. 1710
  8. 1350
  9. 1530
  10. 700
  11. 420
  12. 1350
  13. 900
  14. 1300
  15. 1870
  16. 1000
  17. 440
  18. 750
  19. 180
  20. 4500
  21. 980
  22. 120
  23. 2700
  24. 1120
  25. 1400
  26. 510
  27. 120
  28. 3000
  29. 1870
  30. 250
  31. 600
  32. 540
  33. 5000
  34. 900
  35. 1500
  36. 900
  37. 1430
  38. 1000
  39. 150
  40. 630

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