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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 909 · 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. 1.65 × 8 =
  2. 2.75 × 16 =
  3. 3.125 × 32 =
  4. 4.45 × 14 =
  5. 5.15 × 18 =
  6. 6.125 × 30 =
  7. 7.14 × 125 =
  8. 8.45 × 26 =
  9. 9.75 × 14 =
  10. 10.22 × 35 =
  11. 11.15 × 24 =
  12. 12.45 × 8 =
  13. 13.65 × 40 =
  14. 14.35 × 12 =
  15. 15.55 × 40 =
  16. 16.45 × 6 =
  17. 17.10 × 45 =
  18. 18.22 × 65 =
  19. 19.18 × 35 =
  20. 20.6 × 15 =
  21. 21.45 × 28 =
  22. 22.36 × 35 =
  23. 23.32 × 15 =
  24. 24.8 × 55 =
  25. 25.20 × 125 =
  26. 26.38 × 45 =
  27. 27.38 × 15 =
  28. 28.35 × 12 =
  29. 29.65 × 10 =
  30. 30.24 × 35 =
  31. 31.28 × 15 =
  32. 32.15 × 28 =
  33. 33.15 × 20 =
  34. 34.35 × 20 =
  35. 35.125 × 28 =
  36. 36.18 × 65 =
  37. 37.45 × 22 =
  38. 38.32 × 35 =
  39. 39.125 × 10 =
  40. 40.35 × 26 =

Answer key

  1. 520
  2. 1200
  3. 4000
  4. 630
  5. 270
  6. 3750
  7. 1750
  8. 1170
  9. 1050
  10. 770
  11. 360
  12. 360
  13. 2600
  14. 420
  15. 2200
  16. 270
  17. 450
  18. 1430
  19. 630
  20. 90
  21. 1260
  22. 1260
  23. 480
  24. 440
  25. 2500
  26. 1710
  27. 570
  28. 420
  29. 650
  30. 840
  31. 420
  32. 420
  33. 300
  34. 700
  35. 3500
  36. 1170
  37. 990
  38. 1120
  39. 1250
  40. 910

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