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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 629 · 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. 1.34 × 25 =
  2. 2.10 × 125 =
  3. 3.45 × 36 =
  4. 4.15 × 16 =
  5. 5.65 × 20 =
  6. 6.10 × 35 =
  7. 7.65 × 32 =
  8. 8.15 × 36 =
  9. 9.18 × 25 =
  10. 10.25 × 16 =
  11. 11.6 × 15 =
  12. 12.75 × 8 =
  13. 13.25 × 28 =
  14. 14.16 × 55 =
  15. 15.14 × 25 =
  16. 16.38 × 25 =
  17. 17.25 × 34 =
  18. 18.24 × 45 =
  19. 19.28 × 15 =
  20. 20.75 × 32 =
  21. 21.38 × 35 =
  22. 22.32 × 55 =
  23. 23.125 × 36 =
  24. 24.15 × 24 =
  25. 25.125 × 14 =
  26. 26.18 × 55 =
  27. 27.55 × 6 =
  28. 28.36 × 45 =
  29. 29.55 × 40 =
  30. 30.8 × 75 =
  31. 31.35 × 40 =
  32. 32.15 × 20 =
  33. 33.75 × 12 =
  34. 34.16 × 75 =
  35. 35.36 × 35 =
  36. 36.45 × 12 =
  37. 37.35 × 6 =
  38. 38.8 × 75 =
  39. 39.18 × 15 =
  40. 40.28 × 75 =

Answer key

  1. 850
  2. 1250
  3. 1620
  4. 240
  5. 1300
  6. 350
  7. 2080
  8. 540
  9. 450
  10. 400
  11. 90
  12. 600
  13. 700
  14. 880
  15. 350
  16. 950
  17. 850
  18. 1080
  19. 420
  20. 2400
  21. 1330
  22. 1760
  23. 4500
  24. 360
  25. 1750
  26. 990
  27. 330
  28. 1620
  29. 2200
  30. 600
  31. 1400
  32. 300
  33. 900
  34. 1200
  35. 1260
  36. 540
  37. 210
  38. 600
  39. 270
  40. 2100

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