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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 719 · 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. 1.32 × 15 =
  2. 2.36 × 45 =
  3. 3.14 × 125 =
  4. 4.65 × 6 =
  5. 5.35 × 10 =
  6. 6.15 × 18 =
  7. 7.8 × 45 =
  8. 8.25 × 40 =
  9. 9.16 × 45 =
  10. 10.25 × 36 =
  11. 11.14 × 125 =
  12. 12.34 × 75 =
  13. 13.55 × 34 =
  14. 14.6 × 65 =
  15. 15.24 × 75 =
  16. 16.22 × 15 =
  17. 17.40 × 55 =
  18. 18.55 × 20 =
  19. 19.45 × 8 =
  20. 20.15 × 18 =
  21. 21.125 × 40 =
  22. 22.65 × 16 =
  23. 23.36 × 65 =
  24. 24.15 × 40 =
  25. 25.32 × 75 =
  26. 26.125 × 16 =
  27. 27.25 × 14 =
  28. 28.15 × 20 =
  29. 29.14 × 35 =
  30. 30.45 × 8 =
  31. 31.36 × 15 =
  32. 32.20 × 65 =
  33. 33.15 × 24 =
  34. 34.55 × 40 =
  35. 35.125 × 8 =
  36. 36.45 × 6 =
  37. 37.24 × 55 =
  38. 38.40 × 125 =
  39. 39.26 × 65 =
  40. 40.45 × 10 =

Answer key

  1. 480
  2. 1620
  3. 1750
  4. 390
  5. 350
  6. 270
  7. 360
  8. 1000
  9. 720
  10. 900
  11. 1750
  12. 2550
  13. 1870
  14. 390
  15. 1800
  16. 330
  17. 2200
  18. 1100
  19. 360
  20. 270
  21. 5000
  22. 1040
  23. 2340
  24. 600
  25. 2400
  26. 2000
  27. 350
  28. 300
  29. 490
  30. 360
  31. 540
  32. 1300
  33. 360
  34. 2200
  35. 1000
  36. 270
  37. 1320
  38. 5000
  39. 1690
  40. 450

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