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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 564 · 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 × 25 =
  2. 2.15 × 40 =
  3. 3.75 × 6 =
  4. 4.15 × 12 =
  5. 5.15 × 34 =
  6. 6.36 × 25 =
  7. 7.15 × 38 =
  8. 8.15 × 12 =
  9. 9.35 × 36 =
  10. 10.24 × 65 =
  11. 11.20 × 65 =
  12. 12.45 × 38 =
  13. 13.6 × 35 =
  14. 14.55 × 20 =
  15. 15.75 × 26 =
  16. 16.125 × 38 =
  17. 17.15 × 32 =
  18. 18.15 × 22 =
  19. 19.25 × 26 =
  20. 20.75 × 6 =
  21. 21.25 × 40 =
  22. 22.16 × 15 =
  23. 23.12 × 55 =
  24. 24.75 × 8 =
  25. 25.45 × 30 =
  26. 26.22 × 15 =
  27. 27.65 × 14 =
  28. 28.45 × 28 =
  29. 29.125 × 18 =
  30. 30.18 × 55 =
  31. 31.40 × 15 =
  32. 32.22 × 75 =
  33. 33.28 × 15 =
  34. 34.25 × 20 =
  35. 35.26 × 125 =
  36. 36.30 × 35 =
  37. 37.65 × 26 =
  38. 38.8 × 35 =
  39. 39.125 × 18 =
  40. 40.22 × 35 =

Answer key

  1. 800
  2. 600
  3. 450
  4. 180
  5. 510
  6. 900
  7. 570
  8. 180
  9. 1260
  10. 1560
  11. 1300
  12. 1710
  13. 210
  14. 1100
  15. 1950
  16. 4750
  17. 480
  18. 330
  19. 650
  20. 450
  21. 1000
  22. 240
  23. 660
  24. 600
  25. 1350
  26. 330
  27. 910
  28. 1260
  29. 2250
  30. 990
  31. 600
  32. 1650
  33. 420
  34. 500
  35. 3250
  36. 1050
  37. 1690
  38. 280
  39. 2250
  40. 770

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