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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 730 · 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. 1.32 × 125 =
  2. 2.45 × 8 =
  3. 3.40 × 35 =
  4. 4.25 × 10 =
  5. 5.28 × 65 =
  6. 6.6 × 45 =
  7. 7.45 × 10 =
  8. 8.25 × 38 =
  9. 9.35 × 16 =
  10. 10.25 × 40 =
  11. 11.16 × 35 =
  12. 12.35 × 38 =
  13. 13.65 × 28 =
  14. 14.26 × 25 =
  15. 15.12 × 35 =
  16. 16.40 × 35 =
  17. 17.125 × 24 =
  18. 18.38 × 125 =
  19. 19.20 × 35 =
  20. 20.6 × 55 =
  21. 21.15 × 22 =
  22. 22.40 × 125 =
  23. 23.45 × 8 =
  24. 24.10 × 25 =
  25. 25.55 × 18 =
  26. 26.16 × 35 =
  27. 27.25 × 16 =
  28. 28.75 × 28 =
  29. 29.32 × 35 =
  30. 30.22 × 15 =
  31. 31.75 × 30 =
  32. 32.38 × 75 =
  33. 33.22 × 125 =
  34. 34.75 × 12 =
  35. 35.14 × 25 =
  36. 36.38 × 45 =
  37. 37.25 × 32 =
  38. 38.6 × 125 =
  39. 39.25 × 26 =
  40. 40.25 × 16 =

Answer key

  1. 4000
  2. 360
  3. 1400
  4. 250
  5. 1820
  6. 270
  7. 450
  8. 950
  9. 560
  10. 1000
  11. 560
  12. 1330
  13. 1820
  14. 650
  15. 420
  16. 1400
  17. 3000
  18. 4750
  19. 700
  20. 330
  21. 330
  22. 5000
  23. 360
  24. 250
  25. 990
  26. 560
  27. 400
  28. 2100
  29. 1120
  30. 330
  31. 2250
  32. 2850
  33. 2750
  34. 900
  35. 350
  36. 1710
  37. 800
  38. 750
  39. 650
  40. 400

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