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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 575 · 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. 1.40 × 125 =
  2. 2.25 × 12 =
  3. 3.55 × 20 =
  4. 4.8 × 75 =
  5. 5.36 × 75 =
  6. 6.55 × 26 =
  7. 7.65 × 30 =
  8. 8.34 × 55 =
  9. 9.75 × 38 =
  10. 10.65 × 36 =
  11. 11.15 × 14 =
  12. 12.125 × 6 =
  13. 13.20 × 25 =
  14. 14.6 × 75 =
  15. 15.45 × 12 =
  16. 16.28 × 15 =
  17. 17.30 × 75 =
  18. 18.22 × 35 =
  19. 19.35 × 30 =
  20. 20.34 × 65 =
  21. 21.22 × 45 =
  22. 22.16 × 75 =
  23. 23.6 × 125 =
  24. 24.125 × 12 =
  25. 25.36 × 15 =
  26. 26.24 × 35 =
  27. 27.25 × 8 =
  28. 28.30 × 25 =
  29. 29.6 × 65 =
  30. 30.55 × 36 =
  31. 31.16 × 55 =
  32. 32.125 × 16 =
  33. 33.14 × 55 =
  34. 34.20 × 45 =
  35. 35.8 × 25 =
  36. 36.55 × 16 =
  37. 37.15 × 36 =
  38. 38.24 × 35 =
  39. 39.55 × 16 =
  40. 40.40 × 75 =

Answer key

  1. 5000
  2. 300
  3. 1100
  4. 600
  5. 2700
  6. 1430
  7. 1950
  8. 1870
  9. 2850
  10. 2340
  11. 210
  12. 750
  13. 500
  14. 450
  15. 540
  16. 420
  17. 2250
  18. 770
  19. 1050
  20. 2210
  21. 990
  22. 1200
  23. 750
  24. 1500
  25. 540
  26. 840
  27. 200
  28. 750
  29. 390
  30. 1980
  31. 880
  32. 2000
  33. 770
  34. 900
  35. 200
  36. 880
  37. 540
  38. 840
  39. 880
  40. 3000

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