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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 132 · 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. 1.35 × 20 =
  2. 2.125 × 14 =
  3. 3.45 × 16 =
  4. 4.28 × 75 =
  5. 5.125 × 40 =
  6. 6.12 × 35 =
  7. 7.45 × 28 =
  8. 8.35 × 10 =
  9. 9.34 × 45 =
  10. 10.26 × 15 =
  11. 11.30 × 15 =
  12. 12.6 × 45 =
  13. 13.28 × 35 =
  14. 14.75 × 18 =
  15. 15.15 × 10 =
  16. 16.38 × 25 =
  17. 17.28 × 35 =
  18. 18.32 × 55 =
  19. 19.75 × 14 =
  20. 20.15 × 18 =
  21. 21.65 × 20 =
  22. 22.22 × 65 =
  23. 23.30 × 125 =
  24. 24.18 × 55 =
  25. 25.16 × 75 =
  26. 26.55 × 8 =
  27. 27.22 × 25 =
  28. 28.28 × 15 =
  29. 29.65 × 18 =
  30. 30.12 × 125 =
  31. 31.65 × 32 =
  32. 32.36 × 45 =
  33. 33.65 × 6 =
  34. 34.12 × 45 =
  35. 35.15 × 20 =
  36. 36.36 × 55 =
  37. 37.18 × 15 =
  38. 38.15 × 40 =
  39. 39.45 × 40 =
  40. 40.35 × 32 =

Answer key

  1. 700
  2. 1750
  3. 720
  4. 2100
  5. 5000
  6. 420
  7. 1260
  8. 350
  9. 1530
  10. 390
  11. 450
  12. 270
  13. 980
  14. 1350
  15. 150
  16. 950
  17. 980
  18. 1760
  19. 1050
  20. 270
  21. 1300
  22. 1430
  23. 3750
  24. 990
  25. 1200
  26. 440
  27. 550
  28. 420
  29. 1170
  30. 1500
  31. 2080
  32. 1620
  33. 390
  34. 540
  35. 300
  36. 1980
  37. 270
  38. 600
  39. 1800
  40. 1120

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