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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 75 · 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. 1.24 × 125 =
  2. 2.20 × 125 =
  3. 3.32 × 125 =
  4. 4.34 × 45 =
  5. 5.18 × 45 =
  6. 6.12 × 55 =
  7. 7.15 × 32 =
  8. 8.10 × 45 =
  9. 9.20 × 75 =
  10. 10.45 × 20 =
  11. 11.22 × 45 =
  12. 12.35 × 36 =
  13. 13.24 × 25 =
  14. 14.55 × 6 =
  15. 15.125 × 12 =
  16. 16.6 × 65 =
  17. 17.75 × 20 =
  18. 18.35 × 8 =
  19. 19.20 × 15 =
  20. 20.25 × 8 =
  21. 21.75 × 18 =
  22. 22.75 × 12 =
  23. 23.55 × 8 =
  24. 24.38 × 45 =
  25. 25.12 × 45 =
  26. 26.32 × 25 =
  27. 27.14 × 65 =
  28. 28.45 × 36 =
  29. 29.75 × 10 =
  30. 30.24 × 15 =
  31. 31.28 × 25 =
  32. 32.25 × 30 =
  33. 33.125 × 28 =
  34. 34.25 × 38 =
  35. 35.25 × 16 =
  36. 36.75 × 16 =
  37. 37.125 × 30 =
  38. 38.15 × 36 =
  39. 39.125 × 16 =
  40. 40.75 × 36 =

Answer key

  1. 3000
  2. 2500
  3. 4000
  4. 1530
  5. 810
  6. 660
  7. 480
  8. 450
  9. 1500
  10. 900
  11. 990
  12. 1260
  13. 600
  14. 330
  15. 1500
  16. 390
  17. 1500
  18. 280
  19. 300
  20. 200
  21. 1350
  22. 900
  23. 440
  24. 1710
  25. 540
  26. 800
  27. 910
  28. 1620
  29. 750
  30. 360
  31. 700
  32. 750
  33. 3500
  34. 950
  35. 400
  36. 1200
  37. 3750
  38. 540
  39. 2000
  40. 2700

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