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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 486 · 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. 1.26 × 45 =
  2. 2.28 × 75 =
  3. 3.6 × 25 =
  4. 4.35 × 30 =
  5. 5.45 × 34 =
  6. 6.125 × 12 =
  7. 7.38 × 45 =
  8. 8.55 × 12 =
  9. 9.14 × 25 =
  10. 10.30 × 55 =
  11. 11.36 × 25 =
  12. 12.16 × 125 =
  13. 13.125 × 40 =
  14. 14.10 × 35 =
  15. 15.25 × 24 =
  16. 16.35 × 32 =
  17. 17.75 × 10 =
  18. 18.16 × 35 =
  19. 19.45 × 40 =
  20. 20.8 × 125 =
  21. 21.18 × 25 =
  22. 22.38 × 15 =
  23. 23.65 × 12 =
  24. 24.28 × 75 =
  25. 25.125 × 16 =
  26. 26.65 × 22 =
  27. 27.18 × 125 =
  28. 28.35 × 8 =
  29. 29.30 × 25 =
  30. 30.65 × 32 =
  31. 31.6 × 25 =
  32. 32.125 × 12 =
  33. 33.22 × 25 =
  34. 34.55 × 12 =
  35. 35.65 × 24 =
  36. 36.30 × 75 =
  37. 37.34 × 65 =
  38. 38.65 × 12 =
  39. 39.36 × 75 =
  40. 40.25 × 28 =

Answer key

  1. 1170
  2. 2100
  3. 150
  4. 1050
  5. 1530
  6. 1500
  7. 1710
  8. 660
  9. 350
  10. 1650
  11. 900
  12. 2000
  13. 5000
  14. 350
  15. 600
  16. 1120
  17. 750
  18. 560
  19. 1800
  20. 1000
  21. 450
  22. 570
  23. 780
  24. 2100
  25. 2000
  26. 1430
  27. 2250
  28. 280
  29. 750
  30. 2080
  31. 150
  32. 1500
  33. 550
  34. 660
  35. 1560
  36. 2250
  37. 2210
  38. 780
  39. 2700
  40. 700

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