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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 792 · 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. 1.55 × 14 =
  2. 2.38 × 35 =
  3. 3.25 × 10 =
  4. 4.38 × 45 =
  5. 5.125 × 24 =
  6. 6.8 × 125 =
  7. 7.55 × 12 =
  8. 8.45 × 14 =
  9. 9.35 × 18 =
  10. 10.25 × 32 =
  11. 11.12 × 75 =
  12. 12.34 × 15 =
  13. 13.10 × 15 =
  14. 14.125 × 12 =
  15. 15.15 × 40 =
  16. 16.65 × 32 =
  17. 17.12 × 65 =
  18. 18.36 × 75 =
  19. 19.45 × 34 =
  20. 20.10 × 35 =
  21. 21.16 × 75 =
  22. 22.8 × 75 =
  23. 23.40 × 25 =
  24. 24.35 × 14 =
  25. 25.14 × 45 =
  26. 26.65 × 14 =
  27. 27.34 × 45 =
  28. 28.15 × 38 =
  29. 29.125 × 14 =
  30. 30.65 × 26 =
  31. 31.45 × 30 =
  32. 32.16 × 15 =
  33. 33.22 × 25 =
  34. 34.8 × 45 =
  35. 35.36 × 55 =
  36. 36.125 × 20 =
  37. 37.20 × 75 =
  38. 38.45 × 22 =
  39. 39.15 × 10 =
  40. 40.6 × 75 =

Answer key

  1. 770
  2. 1330
  3. 250
  4. 1710
  5. 3000
  6. 1000
  7. 660
  8. 630
  9. 630
  10. 800
  11. 900
  12. 510
  13. 150
  14. 1500
  15. 600
  16. 2080
  17. 780
  18. 2700
  19. 1530
  20. 350
  21. 1200
  22. 600
  23. 1000
  24. 490
  25. 630
  26. 910
  27. 1530
  28. 570
  29. 1750
  30. 1690
  31. 1350
  32. 240
  33. 550
  34. 360
  35. 1980
  36. 2500
  37. 1500
  38. 990
  39. 150
  40. 450

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