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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 874 · 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. 1.40 × 25 =
  2. 2.55 × 24 =
  3. 3.24 × 55 =
  4. 4.10 × 55 =
  5. 5.55 × 12 =
  6. 6.55 × 20 =
  7. 7.8 × 25 =
  8. 8.125 × 38 =
  9. 9.75 × 14 =
  10. 10.65 × 10 =
  11. 11.75 × 24 =
  12. 12.125 × 36 =
  13. 13.12 × 65 =
  14. 14.10 × 15 =
  15. 15.65 × 12 =
  16. 16.36 × 25 =
  17. 17.65 × 6 =
  18. 18.45 × 8 =
  19. 19.25 × 10 =
  20. 20.125 × 36 =
  21. 21.36 × 15 =
  22. 22.36 × 65 =
  23. 23.25 × 32 =
  24. 24.65 × 6 =
  25. 25.15 × 30 =
  26. 26.65 × 14 =
  27. 27.8 × 55 =
  28. 28.45 × 12 =
  29. 29.30 × 15 =
  30. 30.6 × 55 =
  31. 31.55 × 38 =
  32. 32.10 × 75 =
  33. 33.26 × 35 =
  34. 34.32 × 15 =
  35. 35.20 × 75 =
  36. 36.55 × 12 =
  37. 37.8 × 35 =
  38. 38.45 × 38 =
  39. 39.125 × 18 =
  40. 40.22 × 55 =

Answer key

  1. 1000
  2. 1320
  3. 1320
  4. 550
  5. 660
  6. 1100
  7. 200
  8. 4750
  9. 1050
  10. 650
  11. 1800
  12. 4500
  13. 780
  14. 150
  15. 780
  16. 900
  17. 390
  18. 360
  19. 250
  20. 4500
  21. 540
  22. 2340
  23. 800
  24. 390
  25. 450
  26. 910
  27. 440
  28. 540
  29. 450
  30. 330
  31. 2090
  32. 750
  33. 910
  34. 480
  35. 1500
  36. 660
  37. 280
  38. 1710
  39. 2250
  40. 1210

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