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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 707 · 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. 1.25 × 32 =
  2. 2.32 × 15 =
  3. 3.75 × 10 =
  4. 4.22 × 35 =
  5. 5.26 × 125 =
  6. 6.55 × 18 =
  7. 7.55 × 24 =
  8. 8.45 × 8 =
  9. 9.6 × 125 =
  10. 10.6 × 75 =
  11. 11.45 × 14 =
  12. 12.16 × 45 =
  13. 13.35 × 10 =
  14. 14.15 × 34 =
  15. 15.45 × 26 =
  16. 16.25 × 14 =
  17. 17.26 × 25 =
  18. 18.18 × 45 =
  19. 19.15 × 28 =
  20. 20.65 × 14 =
  21. 21.34 × 75 =
  22. 22.35 × 36 =
  23. 23.15 × 10 =
  24. 24.36 × 25 =
  25. 25.15 × 8 =
  26. 26.75 × 8 =
  27. 27.15 × 8 =
  28. 28.75 × 24 =
  29. 29.30 × 125 =
  30. 30.26 × 25 =
  31. 31.14 × 15 =
  32. 32.125 × 14 =
  33. 33.25 × 10 =
  34. 34.28 × 75 =
  35. 35.6 × 125 =
  36. 36.125 × 40 =
  37. 37.25 × 8 =
  38. 38.25 × 6 =
  39. 39.16 × 65 =
  40. 40.34 × 25 =

Answer key

  1. 800
  2. 480
  3. 750
  4. 770
  5. 3250
  6. 990
  7. 1320
  8. 360
  9. 750
  10. 450
  11. 630
  12. 720
  13. 350
  14. 510
  15. 1170
  16. 350
  17. 650
  18. 810
  19. 420
  20. 910
  21. 2550
  22. 1260
  23. 150
  24. 900
  25. 120
  26. 600
  27. 120
  28. 1800
  29. 3750
  30. 650
  31. 210
  32. 1750
  33. 250
  34. 2100
  35. 750
  36. 5000
  37. 200
  38. 150
  39. 1040
  40. 850

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