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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 571 · 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. 1.75 × 10 =
  2. 2.65 × 22 =
  3. 3.125 × 6 =
  4. 4.36 × 15 =
  5. 5.65 × 18 =
  6. 6.10 × 75 =
  7. 7.22 × 55 =
  8. 8.6 × 125 =
  9. 9.26 × 55 =
  10. 10.10 × 125 =
  11. 11.14 × 35 =
  12. 12.45 × 24 =
  13. 13.8 × 75 =
  14. 14.15 × 20 =
  15. 15.16 × 25 =
  16. 16.75 × 40 =
  17. 17.55 × 20 =
  18. 18.15 × 6 =
  19. 19.65 × 22 =
  20. 20.45 × 32 =
  21. 21.65 × 24 =
  22. 22.8 × 25 =
  23. 23.35 × 36 =
  24. 24.125 × 16 =
  25. 25.20 × 45 =
  26. 26.6 × 15 =
  27. 27.75 × 38 =
  28. 28.55 × 10 =
  29. 29.22 × 125 =
  30. 30.15 × 18 =
  31. 31.28 × 55 =
  32. 32.20 × 125 =
  33. 33.25 × 6 =
  34. 34.35 × 22 =
  35. 35.20 × 25 =
  36. 36.75 × 12 =
  37. 37.15 × 30 =
  38. 38.35 × 30 =
  39. 39.34 × 25 =
  40. 40.45 × 14 =

Answer key

  1. 750
  2. 1430
  3. 750
  4. 540
  5. 1170
  6. 750
  7. 1210
  8. 750
  9. 1430
  10. 1250
  11. 490
  12. 1080
  13. 600
  14. 300
  15. 400
  16. 3000
  17. 1100
  18. 90
  19. 1430
  20. 1440
  21. 1560
  22. 200
  23. 1260
  24. 2000
  25. 900
  26. 90
  27. 2850
  28. 550
  29. 2750
  30. 270
  31. 1540
  32. 2500
  33. 150
  34. 770
  35. 500
  36. 900
  37. 450
  38. 1050
  39. 850
  40. 630

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