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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 931 · 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. 1.38 × 75 =
  2. 2.40 × 25 =
  3. 3.22 × 35 =
  4. 4.15 × 18 =
  5. 5.35 × 10 =
  6. 6.15 × 38 =
  7. 7.75 × 6 =
  8. 8.34 × 45 =
  9. 9.15 × 6 =
  10. 10.35 × 8 =
  11. 11.32 × 25 =
  12. 12.12 × 65 =
  13. 13.45 × 20 =
  14. 14.34 × 75 =
  15. 15.125 × 30 =
  16. 16.55 × 28 =
  17. 17.45 × 38 =
  18. 18.6 × 125 =
  19. 19.45 × 10 =
  20. 20.65 × 8 =
  21. 21.25 × 24 =
  22. 22.40 × 125 =
  23. 23.26 × 35 =
  24. 24.38 × 25 =
  25. 25.125 × 12 =
  26. 26.25 × 34 =
  27. 27.35 × 40 =
  28. 28.25 × 12 =
  29. 29.125 × 20 =
  30. 30.18 × 45 =
  31. 31.35 × 34 =
  32. 32.36 × 125 =
  33. 33.75 × 26 =
  34. 34.75 × 32 =
  35. 35.75 × 22 =
  36. 36.65 × 34 =
  37. 37.14 × 25 =
  38. 38.16 × 75 =
  39. 39.15 × 30 =
  40. 40.14 × 125 =

Answer key

  1. 2850
  2. 1000
  3. 770
  4. 270
  5. 350
  6. 570
  7. 450
  8. 1530
  9. 90
  10. 280
  11. 800
  12. 780
  13. 900
  14. 2550
  15. 3750
  16. 1540
  17. 1710
  18. 750
  19. 450
  20. 520
  21. 600
  22. 5000
  23. 910
  24. 950
  25. 1500
  26. 850
  27. 1400
  28. 300
  29. 2500
  30. 810
  31. 1190
  32. 4500
  33. 1950
  34. 2400
  35. 1650
  36. 2210
  37. 350
  38. 1200
  39. 450
  40. 1750

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