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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 843 · 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 × 24 =
  2. 2.35 × 8 =
  3. 3.32 × 55 =
  4. 4.24 × 125 =
  5. 5.12 × 125 =
  6. 6.45 × 20 =
  7. 7.15 × 14 =
  8. 8.75 × 12 =
  9. 9.125 × 6 =
  10. 10.45 × 26 =
  11. 11.15 × 8 =
  12. 12.22 × 45 =
  13. 13.10 × 125 =
  14. 14.75 × 28 =
  15. 15.40 × 75 =
  16. 16.55 × 10 =
  17. 17.34 × 45 =
  18. 18.65 × 36 =
  19. 19.125 × 36 =
  20. 20.14 × 15 =
  21. 21.25 × 8 =
  22. 22.15 × 40 =
  23. 23.35 × 8 =
  24. 24.75 × 40 =
  25. 25.125 × 14 =
  26. 26.25 × 34 =
  27. 27.14 × 125 =
  28. 28.55 × 28 =
  29. 29.45 × 10 =
  30. 30.75 × 22 =
  31. 31.10 × 25 =
  32. 32.16 × 65 =
  33. 33.65 × 34 =
  34. 34.12 × 15 =
  35. 35.35 × 30 =
  36. 36.25 × 30 =
  37. 37.35 × 10 =
  38. 38.65 × 40 =
  39. 39.35 × 16 =
  40. 40.45 × 14 =

Answer key

  1. 1560
  2. 280
  3. 1760
  4. 3000
  5. 1500
  6. 900
  7. 210
  8. 900
  9. 750
  10. 1170
  11. 120
  12. 990
  13. 1250
  14. 2100
  15. 3000
  16. 550
  17. 1530
  18. 2340
  19. 4500
  20. 210
  21. 200
  22. 600
  23. 280
  24. 3000
  25. 1750
  26. 850
  27. 1750
  28. 1540
  29. 450
  30. 1650
  31. 250
  32. 1040
  33. 2210
  34. 180
  35. 1050
  36. 750
  37. 350
  38. 2600
  39. 560
  40. 630

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