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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 293 · 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. 1.30 × 125 =
  2. 2.15 × 24 =
  3. 3.65 × 30 =
  4. 4.15 × 40 =
  5. 5.26 × 75 =
  6. 6.25 × 12 =
  7. 7.55 × 16 =
  8. 8.65 × 12 =
  9. 9.125 × 26 =
  10. 10.6 × 25 =
  11. 11.22 × 35 =
  12. 12.125 × 6 =
  13. 13.125 × 32 =
  14. 14.36 × 45 =
  15. 15.65 × 36 =
  16. 16.25 × 14 =
  17. 17.125 × 24 =
  18. 18.6 × 15 =
  19. 19.45 × 36 =
  20. 20.14 × 125 =
  21. 21.15 × 36 =
  22. 22.26 × 125 =
  23. 23.38 × 25 =
  24. 24.14 × 65 =
  25. 25.15 × 30 =
  26. 26.75 × 16 =
  27. 27.12 × 75 =
  28. 28.24 × 45 =
  29. 29.25 × 20 =
  30. 30.125 × 12 =
  31. 31.45 × 40 =
  32. 32.65 × 28 =
  33. 33.22 × 75 =
  34. 34.14 × 45 =
  35. 35.36 × 45 =
  36. 36.65 × 32 =
  37. 37.25 × 8 =
  38. 38.22 × 55 =
  39. 39.6 × 75 =
  40. 40.25 × 36 =

Answer key

  1. 3750
  2. 360
  3. 1950
  4. 600
  5. 1950
  6. 300
  7. 880
  8. 780
  9. 3250
  10. 150
  11. 770
  12. 750
  13. 4000
  14. 1620
  15. 2340
  16. 350
  17. 3000
  18. 90
  19. 1620
  20. 1750
  21. 540
  22. 3250
  23. 950
  24. 910
  25. 450
  26. 1200
  27. 900
  28. 1080
  29. 500
  30. 1500
  31. 1800
  32. 1820
  33. 1650
  34. 630
  35. 1620
  36. 2080
  37. 200
  38. 1210
  39. 450
  40. 900

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