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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 890 · 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. 1.12 × 75 =
  2. 2.45 × 6 =
  3. 3.28 × 25 =
  4. 4.28 × 75 =
  5. 5.75 × 20 =
  6. 6.15 × 28 =
  7. 7.15 × 18 =
  8. 8.25 × 10 =
  9. 9.14 × 75 =
  10. 10.55 × 26 =
  11. 11.75 × 6 =
  12. 12.75 × 28 =
  13. 13.35 × 18 =
  14. 14.36 × 65 =
  15. 15.45 × 18 =
  16. 16.65 × 30 =
  17. 17.45 × 18 =
  18. 18.45 × 24 =
  19. 19.125 × 28 =
  20. 20.26 × 65 =
  21. 21.55 × 26 =
  22. 22.35 × 12 =
  23. 23.34 × 75 =
  24. 24.16 × 65 =
  25. 25.18 × 15 =
  26. 26.38 × 25 =
  27. 27.125 × 20 =
  28. 28.22 × 15 =
  29. 29.32 × 65 =
  30. 30.14 × 65 =
  31. 31.8 × 55 =
  32. 32.65 × 14 =
  33. 33.75 × 26 =
  34. 34.35 × 20 =
  35. 35.15 × 12 =
  36. 36.6 × 15 =
  37. 37.24 × 45 =
  38. 38.15 × 20 =
  39. 39.75 × 16 =
  40. 40.30 × 125 =

Answer key

  1. 900
  2. 270
  3. 700
  4. 2100
  5. 1500
  6. 420
  7. 270
  8. 250
  9. 1050
  10. 1430
  11. 450
  12. 2100
  13. 630
  14. 2340
  15. 810
  16. 1950
  17. 810
  18. 1080
  19. 3500
  20. 1690
  21. 1430
  22. 420
  23. 2550
  24. 1040
  25. 270
  26. 950
  27. 2500
  28. 330
  29. 2080
  30. 910
  31. 440
  32. 910
  33. 1950
  34. 700
  35. 180
  36. 90
  37. 1080
  38. 300
  39. 1200
  40. 3750

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