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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 219 · 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. 1.25 × 36 =
  2. 2.20 × 125 =
  3. 3.25 × 32 =
  4. 4.34 × 65 =
  5. 5.8 × 45 =
  6. 6.55 × 20 =
  7. 7.22 × 25 =
  8. 8.24 × 125 =
  9. 9.26 × 25 =
  10. 10.55 × 38 =
  11. 11.24 × 15 =
  12. 12.14 × 125 =
  13. 13.55 × 10 =
  14. 14.36 × 25 =
  15. 15.20 × 15 =
  16. 16.55 × 20 =
  17. 17.25 × 32 =
  18. 18.20 × 15 =
  19. 19.30 × 25 =
  20. 20.36 × 15 =
  21. 21.75 × 10 =
  22. 22.28 × 45 =
  23. 23.16 × 55 =
  24. 24.125 × 40 =
  25. 25.65 × 14 =
  26. 26.125 × 14 =
  27. 27.25 × 28 =
  28. 28.75 × 12 =
  29. 29.12 × 125 =
  30. 30.55 × 34 =
  31. 31.125 × 36 =
  32. 32.75 × 12 =
  33. 33.75 × 8 =
  34. 34.25 × 10 =
  35. 35.36 × 45 =
  36. 36.75 × 36 =
  37. 37.20 × 15 =
  38. 38.6 × 35 =
  39. 39.16 × 75 =
  40. 40.125 × 18 =

Answer key

  1. 900
  2. 2500
  3. 800
  4. 2210
  5. 360
  6. 1100
  7. 550
  8. 3000
  9. 650
  10. 2090
  11. 360
  12. 1750
  13. 550
  14. 900
  15. 300
  16. 1100
  17. 800
  18. 300
  19. 750
  20. 540
  21. 750
  22. 1260
  23. 880
  24. 5000
  25. 910
  26. 1750
  27. 700
  28. 900
  29. 1500
  30. 1870
  31. 4500
  32. 900
  33. 600
  34. 250
  35. 1620
  36. 2700
  37. 300
  38. 210
  39. 1200
  40. 2250

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