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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 25 · 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 × 32 =
  2. 2.75 × 40 =
  3. 3.75 × 14 =
  4. 4.10 × 75 =
  5. 5.55 × 16 =
  6. 6.65 × 14 =
  7. 7.25 × 6 =
  8. 8.25 × 10 =
  9. 9.125 × 32 =
  10. 10.35 × 12 =
  11. 11.15 × 36 =
  12. 12.35 × 14 =
  13. 13.45 × 20 =
  14. 14.34 × 45 =
  15. 15.25 × 38 =
  16. 16.65 × 12 =
  17. 17.65 × 34 =
  18. 18.45 × 8 =
  19. 19.22 × 125 =
  20. 20.18 × 15 =
  21. 21.38 × 125 =
  22. 22.55 × 26 =
  23. 23.6 × 65 =
  24. 24.38 × 15 =
  25. 25.25 × 24 =
  26. 26.26 × 45 =
  27. 27.34 × 25 =
  28. 28.38 × 45 =
  29. 29.26 × 55 =
  30. 30.40 × 45 =
  31. 31.14 × 15 =
  32. 32.24 × 55 =
  33. 33.65 × 24 =
  34. 34.25 × 30 =
  35. 35.6 × 45 =
  36. 36.15 × 32 =
  37. 37.12 × 65 =
  38. 38.40 × 45 =
  39. 39.32 × 75 =
  40. 40.14 × 45 =

Answer key

  1. 1760
  2. 3000
  3. 1050
  4. 750
  5. 880
  6. 910
  7. 150
  8. 250
  9. 4000
  10. 420
  11. 540
  12. 490
  13. 900
  14. 1530
  15. 950
  16. 780
  17. 2210
  18. 360
  19. 2750
  20. 270
  21. 4750
  22. 1430
  23. 390
  24. 570
  25. 600
  26. 1170
  27. 850
  28. 1710
  29. 1430
  30. 1800
  31. 210
  32. 1320
  33. 1560
  34. 750
  35. 270
  36. 480
  37. 780
  38. 1800
  39. 2400
  40. 630

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