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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 829 · 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 × 14 =
  2. 2.12 × 55 =
  3. 3.16 × 15 =
  4. 4.30 × 75 =
  5. 5.125 × 26 =
  6. 6.6 × 55 =
  7. 7.40 × 55 =
  8. 8.10 × 55 =
  9. 9.40 × 25 =
  10. 10.6 × 35 =
  11. 11.18 × 35 =
  12. 12.125 × 40 =
  13. 13.36 × 15 =
  14. 14.32 × 15 =
  15. 15.12 × 25 =
  16. 16.25 × 26 =
  17. 17.16 × 45 =
  18. 18.36 × 15 =
  19. 19.10 × 75 =
  20. 20.14 × 65 =
  21. 21.75 × 6 =
  22. 22.18 × 25 =
  23. 23.45 × 36 =
  24. 24.40 × 15 =
  25. 25.125 × 18 =
  26. 26.55 × 32 =
  27. 27.65 × 38 =
  28. 28.36 × 75 =
  29. 29.32 × 55 =
  30. 30.12 × 25 =
  31. 31.8 × 25 =
  32. 32.65 × 22 =
  33. 33.38 × 45 =
  34. 34.24 × 45 =
  35. 35.24 × 35 =
  36. 36.32 × 25 =
  37. 37.75 × 30 =
  38. 38.14 × 25 =
  39. 39.20 × 45 =
  40. 40.125 × 12 =

Answer key

  1. 770
  2. 660
  3. 240
  4. 2250
  5. 3250
  6. 330
  7. 2200
  8. 550
  9. 1000
  10. 210
  11. 630
  12. 5000
  13. 540
  14. 480
  15. 300
  16. 650
  17. 720
  18. 540
  19. 750
  20. 910
  21. 450
  22. 450
  23. 1620
  24. 600
  25. 2250
  26. 1760
  27. 2470
  28. 2700
  29. 1760
  30. 300
  31. 200
  32. 1430
  33. 1710
  34. 1080
  35. 840
  36. 800
  37. 2250
  38. 350
  39. 900
  40. 1500

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