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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 839 · 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 × 14 =
  2. 2.45 × 36 =
  3. 3.45 × 28 =
  4. 4.45 × 32 =
  5. 5.8 × 25 =
  6. 6.12 × 15 =
  7. 7.25 × 22 =
  8. 8.75 × 12 =
  9. 9.25 × 6 =
  10. 10.25 × 6 =
  11. 11.55 × 34 =
  12. 12.75 × 10 =
  13. 13.12 × 75 =
  14. 14.55 × 16 =
  15. 15.28 × 15 =
  16. 16.125 × 40 =
  17. 17.24 × 35 =
  18. 18.32 × 55 =
  19. 19.25 × 26 =
  20. 20.20 × 25 =
  21. 21.65 × 20 =
  22. 22.10 × 25 =
  23. 23.20 × 55 =
  24. 24.10 × 45 =
  25. 25.15 × 24 =
  26. 26.125 × 8 =
  27. 27.8 × 125 =
  28. 28.125 × 12 =
  29. 29.55 × 16 =
  30. 30.65 × 26 =
  31. 31.8 × 75 =
  32. 32.26 × 15 =
  33. 33.25 × 32 =
  34. 34.25 × 24 =
  35. 35.25 × 40 =
  36. 36.25 × 6 =
  37. 37.24 × 45 =
  38. 38.55 × 38 =
  39. 39.55 × 8 =
  40. 40.28 × 125 =

Answer key

  1. 910
  2. 1620
  3. 1260
  4. 1440
  5. 200
  6. 180
  7. 550
  8. 900
  9. 150
  10. 150
  11. 1870
  12. 750
  13. 900
  14. 880
  15. 420
  16. 5000
  17. 840
  18. 1760
  19. 650
  20. 500
  21. 1300
  22. 250
  23. 1100
  24. 450
  25. 360
  26. 1000
  27. 1000
  28. 1500
  29. 880
  30. 1690
  31. 600
  32. 390
  33. 800
  34. 600
  35. 1000
  36. 150
  37. 1080
  38. 2090
  39. 440
  40. 3500

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