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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 676 · 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 × 38 =
  2. 2.65 × 16 =
  3. 3.15 × 16 =
  4. 4.8 × 125 =
  5. 5.6 × 75 =
  6. 6.36 × 75 =
  7. 7.20 × 15 =
  8. 8.20 × 25 =
  9. 9.65 × 10 =
  10. 10.15 × 26 =
  11. 11.15 × 10 =
  12. 12.15 × 20 =
  13. 13.35 × 12 =
  14. 14.15 × 26 =
  15. 15.28 × 35 =
  16. 16.75 × 36 =
  17. 17.8 × 25 =
  18. 18.22 × 35 =
  19. 19.8 × 25 =
  20. 20.26 × 45 =
  21. 21.25 × 16 =
  22. 22.125 × 20 =
  23. 23.40 × 55 =
  24. 24.18 × 75 =
  25. 25.45 × 26 =
  26. 26.8 × 65 =
  27. 27.6 × 15 =
  28. 28.28 × 25 =
  29. 29.45 × 28 =
  30. 30.40 × 75 =
  31. 31.20 × 15 =
  32. 32.45 × 24 =
  33. 33.125 × 28 =
  34. 34.55 × 34 =
  35. 35.28 × 25 =
  36. 36.22 × 65 =
  37. 37.16 × 125 =
  38. 38.35 × 36 =
  39. 39.55 × 34 =
  40. 40.75 × 20 =

Answer key

  1. 950
  2. 1040
  3. 240
  4. 1000
  5. 450
  6. 2700
  7. 300
  8. 500
  9. 650
  10. 390
  11. 150
  12. 300
  13. 420
  14. 390
  15. 980
  16. 2700
  17. 200
  18. 770
  19. 200
  20. 1170
  21. 400
  22. 2500
  23. 2200
  24. 1350
  25. 1170
  26. 520
  27. 90
  28. 700
  29. 1260
  30. 3000
  31. 300
  32. 1080
  33. 3500
  34. 1870
  35. 700
  36. 1430
  37. 2000
  38. 1260
  39. 1870
  40. 1500

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