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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 110 · 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. 1.15 × 8 =
  2. 2.16 × 75 =
  3. 3.45 × 20 =
  4. 4.20 × 65 =
  5. 5.125 × 34 =
  6. 6.35 × 8 =
  7. 7.8 × 55 =
  8. 8.55 × 30 =
  9. 9.40 × 45 =
  10. 10.15 × 8 =
  11. 11.15 × 16 =
  12. 12.40 × 15 =
  13. 13.75 × 36 =
  14. 14.38 × 25 =
  15. 15.55 × 26 =
  16. 16.28 × 35 =
  17. 17.12 × 55 =
  18. 18.125 × 36 =
  19. 19.25 × 26 =
  20. 20.55 × 30 =
  21. 21.125 × 24 =
  22. 22.45 × 34 =
  23. 23.24 × 35 =
  24. 24.16 × 25 =
  25. 25.24 × 25 =
  26. 26.25 × 20 =
  27. 27.25 × 24 =
  28. 28.40 × 35 =
  29. 29.35 × 12 =
  30. 30.75 × 16 =
  31. 31.75 × 36 =
  32. 32.25 × 14 =
  33. 33.18 × 75 =
  34. 34.12 × 45 =
  35. 35.6 × 55 =
  36. 36.14 × 25 =
  37. 37.75 × 22 =
  38. 38.24 × 25 =
  39. 39.75 × 26 =
  40. 40.45 × 20 =

Answer key

  1. 120
  2. 1200
  3. 900
  4. 1300
  5. 4250
  6. 280
  7. 440
  8. 1650
  9. 1800
  10. 120
  11. 240
  12. 600
  13. 2700
  14. 950
  15. 1430
  16. 980
  17. 660
  18. 4500
  19. 650
  20. 1650
  21. 3000
  22. 1530
  23. 840
  24. 400
  25. 600
  26. 500
  27. 600
  28. 1400
  29. 420
  30. 1200
  31. 2700
  32. 350
  33. 1350
  34. 540
  35. 330
  36. 350
  37. 1650
  38. 600
  39. 1950
  40. 900

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