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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 800 · 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. 1.55 × 30 =
  2. 2.75 × 28 =
  3. 3.45 × 8 =
  4. 4.40 × 25 =
  5. 5.25 × 20 =
  6. 6.38 × 45 =
  7. 7.12 × 75 =
  8. 8.125 × 32 =
  9. 9.55 × 28 =
  10. 10.14 × 125 =
  11. 11.15 × 40 =
  12. 12.38 × 125 =
  13. 13.24 × 45 =
  14. 14.65 × 26 =
  15. 15.24 × 15 =
  16. 16.35 × 40 =
  17. 17.15 × 30 =
  18. 18.30 × 65 =
  19. 19.15 × 6 =
  20. 20.32 × 35 =
  21. 21.65 × 14 =
  22. 22.35 × 40 =
  23. 23.65 × 28 =
  24. 24.14 × 45 =
  25. 25.45 × 26 =
  26. 26.38 × 15 =
  27. 27.55 × 10 =
  28. 28.38 × 125 =
  29. 29.12 × 15 =
  30. 30.12 × 65 =
  31. 31.26 × 125 =
  32. 32.16 × 45 =
  33. 33.75 × 28 =
  34. 34.24 × 45 =
  35. 35.32 × 55 =
  36. 36.12 × 25 =
  37. 37.20 × 55 =
  38. 38.10 × 45 =
  39. 39.15 × 20 =
  40. 40.26 × 25 =

Answer key

  1. 1650
  2. 2100
  3. 360
  4. 1000
  5. 500
  6. 1710
  7. 900
  8. 4000
  9. 1540
  10. 1750
  11. 600
  12. 4750
  13. 1080
  14. 1690
  15. 360
  16. 1400
  17. 450
  18. 1950
  19. 90
  20. 1120
  21. 910
  22. 1400
  23. 1820
  24. 630
  25. 1170
  26. 570
  27. 550
  28. 4750
  29. 180
  30. 780
  31. 3250
  32. 720
  33. 2100
  34. 1080
  35. 1760
  36. 300
  37. 1100
  38. 450
  39. 300
  40. 650

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