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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 120 · 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. 1.36 × 125 =
  2. 2.35 × 20 =
  3. 3.35 × 6 =
  4. 4.10 × 45 =
  5. 5.25 × 30 =
  6. 6.25 × 6 =
  7. 7.55 × 18 =
  8. 8.35 × 10 =
  9. 9.35 × 28 =
  10. 10.55 × 18 =
  11. 11.12 × 25 =
  12. 12.26 × 125 =
  13. 13.45 × 26 =
  14. 14.75 × 28 =
  15. 15.8 × 75 =
  16. 16.75 × 26 =
  17. 17.35 × 34 =
  18. 18.75 × 32 =
  19. 19.125 × 40 =
  20. 20.25 × 38 =
  21. 21.55 × 40 =
  22. 22.55 × 14 =
  23. 23.25 × 8 =
  24. 24.36 × 45 =
  25. 25.40 × 45 =
  26. 26.65 × 40 =
  27. 27.10 × 35 =
  28. 28.15 × 28 =
  29. 29.65 × 12 =
  30. 30.55 × 36 =
  31. 31.45 × 10 =
  32. 32.32 × 75 =
  33. 33.36 × 35 =
  34. 34.25 × 36 =
  35. 35.25 × 6 =
  36. 36.55 × 8 =
  37. 37.25 × 10 =
  38. 38.24 × 55 =
  39. 39.15 × 20 =
  40. 40.125 × 20 =

Answer key

  1. 4500
  2. 700
  3. 210
  4. 450
  5. 750
  6. 150
  7. 990
  8. 350
  9. 980
  10. 990
  11. 300
  12. 3250
  13. 1170
  14. 2100
  15. 600
  16. 1950
  17. 1190
  18. 2400
  19. 5000
  20. 950
  21. 2200
  22. 770
  23. 200
  24. 1620
  25. 1800
  26. 2600
  27. 350
  28. 420
  29. 780
  30. 1980
  31. 450
  32. 2400
  33. 1260
  34. 900
  35. 150
  36. 440
  37. 250
  38. 1320
  39. 300
  40. 2500

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