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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 711 · 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. 1.125 × 14 =
  2. 2.45 × 20 =
  3. 3.12 × 45 =
  4. 4.10 × 35 =
  5. 5.24 × 45 =
  6. 6.32 × 125 =
  7. 7.45 × 22 =
  8. 8.75 × 26 =
  9. 9.75 × 12 =
  10. 10.20 × 45 =
  11. 11.34 × 45 =
  12. 12.12 × 65 =
  13. 13.75 × 40 =
  14. 14.22 × 45 =
  15. 15.15 × 30 =
  16. 16.65 × 30 =
  17. 17.35 × 30 =
  18. 18.36 × 15 =
  19. 19.14 × 15 =
  20. 20.25 × 20 =
  21. 21.25 × 30 =
  22. 22.65 × 26 =
  23. 23.18 × 15 =
  24. 24.36 × 25 =
  25. 25.36 × 125 =
  26. 26.24 × 65 =
  27. 27.12 × 35 =
  28. 28.65 × 10 =
  29. 29.125 × 30 =
  30. 30.25 × 30 =
  31. 31.38 × 65 =
  32. 32.65 × 14 =
  33. 33.125 × 14 =
  34. 34.75 × 26 =
  35. 35.125 × 32 =
  36. 36.125 × 22 =
  37. 37.6 × 65 =
  38. 38.125 × 18 =
  39. 39.38 × 65 =
  40. 40.20 × 125 =

Answer key

  1. 1750
  2. 900
  3. 540
  4. 350
  5. 1080
  6. 4000
  7. 990
  8. 1950
  9. 900
  10. 900
  11. 1530
  12. 780
  13. 3000
  14. 990
  15. 450
  16. 1950
  17. 1050
  18. 540
  19. 210
  20. 500
  21. 750
  22. 1690
  23. 270
  24. 900
  25. 4500
  26. 1560
  27. 420
  28. 650
  29. 3750
  30. 750
  31. 2470
  32. 910
  33. 1750
  34. 1950
  35. 4000
  36. 2750
  37. 390
  38. 2250
  39. 2470
  40. 2500

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