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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 104 · 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. 1.125 × 38 =
  2. 2.75 × 6 =
  3. 3.35 × 16 =
  4. 4.15 × 8 =
  5. 5.125 × 12 =
  6. 6.34 × 35 =
  7. 7.55 × 28 =
  8. 8.38 × 15 =
  9. 9.75 × 34 =
  10. 10.75 × 32 =
  11. 11.15 × 12 =
  12. 12.25 × 38 =
  13. 13.38 × 35 =
  14. 14.40 × 15 =
  15. 15.55 × 32 =
  16. 16.38 × 75 =
  17. 17.26 × 25 =
  18. 18.16 × 15 =
  19. 19.125 × 40 =
  20. 20.55 × 38 =
  21. 21.65 × 32 =
  22. 22.16 × 55 =
  23. 23.12 × 125 =
  24. 24.15 × 30 =
  25. 25.32 × 55 =
  26. 26.125 × 14 =
  27. 27.6 × 25 =
  28. 28.25 × 32 =
  29. 29.38 × 25 =
  30. 30.45 × 6 =
  31. 31.40 × 75 =
  32. 32.24 × 125 =
  33. 33.25 × 10 =
  34. 34.24 × 25 =
  35. 35.20 × 75 =
  36. 36.35 × 14 =
  37. 37.15 × 40 =
  38. 38.10 × 55 =
  39. 39.35 × 6 =
  40. 40.25 × 40 =

Answer key

  1. 4750
  2. 450
  3. 560
  4. 120
  5. 1500
  6. 1190
  7. 1540
  8. 570
  9. 2550
  10. 2400
  11. 180
  12. 950
  13. 1330
  14. 600
  15. 1760
  16. 2850
  17. 650
  18. 240
  19. 5000
  20. 2090
  21. 2080
  22. 880
  23. 1500
  24. 450
  25. 1760
  26. 1750
  27. 150
  28. 800
  29. 950
  30. 270
  31. 3000
  32. 3000
  33. 250
  34. 600
  35. 1500
  36. 490
  37. 600
  38. 550
  39. 210
  40. 1000

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