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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 545 · 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 × 24 =
  2. 2.125 × 26 =
  3. 3.55 × 36 =
  4. 4.25 × 26 =
  5. 5.55 × 18 =
  6. 6.38 × 35 =
  7. 7.8 × 45 =
  8. 8.25 × 6 =
  9. 9.26 × 15 =
  10. 10.16 × 25 =
  11. 11.14 × 45 =
  12. 12.15 × 28 =
  13. 13.15 × 30 =
  14. 14.16 × 25 =
  15. 15.75 × 22 =
  16. 16.32 × 125 =
  17. 17.38 × 35 =
  18. 18.25 × 18 =
  19. 19.125 × 26 =
  20. 20.45 × 36 =
  21. 21.25 × 28 =
  22. 22.25 × 20 =
  23. 23.15 × 22 =
  24. 24.45 × 34 =
  25. 25.15 × 36 =
  26. 26.6 × 15 =
  27. 27.25 × 10 =
  28. 28.8 × 15 =
  29. 29.75 × 36 =
  30. 30.65 × 10 =
  31. 31.38 × 25 =
  32. 32.36 × 125 =
  33. 33.55 × 12 =
  34. 34.15 × 12 =
  35. 35.34 × 15 =
  36. 36.24 × 65 =
  37. 37.32 × 75 =
  38. 38.75 × 6 =
  39. 39.75 × 24 =
  40. 40.45 × 32 =

Answer key

  1. 600
  2. 3250
  3. 1980
  4. 650
  5. 990
  6. 1330
  7. 360
  8. 150
  9. 390
  10. 400
  11. 630
  12. 420
  13. 450
  14. 400
  15. 1650
  16. 4000
  17. 1330
  18. 450
  19. 3250
  20. 1620
  21. 700
  22. 500
  23. 330
  24. 1530
  25. 540
  26. 90
  27. 250
  28. 120
  29. 2700
  30. 650
  31. 950
  32. 4500
  33. 660
  34. 180
  35. 510
  36. 1560
  37. 2400
  38. 450
  39. 1800
  40. 1440

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