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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 138 · 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. 1.24 × 75 =
  2. 2.16 × 15 =
  3. 3.35 × 40 =
  4. 4.40 × 45 =
  5. 5.35 × 32 =
  6. 6.15 × 40 =
  7. 7.55 × 10 =
  8. 8.15 × 10 =
  9. 9.25 × 40 =
  10. 10.65 × 32 =
  11. 11.12 × 75 =
  12. 12.35 × 12 =
  13. 13.45 × 22 =
  14. 14.55 × 38 =
  15. 15.32 × 125 =
  16. 16.15 × 6 =
  17. 17.18 × 35 =
  18. 18.25 × 38 =
  19. 19.65 × 22 =
  20. 20.10 × 15 =
  21. 21.25 × 28 =
  22. 22.55 × 22 =
  23. 23.35 × 12 =
  24. 24.55 × 28 =
  25. 25.36 × 35 =
  26. 26.8 × 35 =
  27. 27.24 × 75 =
  28. 28.45 × 16 =
  29. 29.22 × 25 =
  30. 30.34 × 125 =
  31. 31.6 × 15 =
  32. 32.125 × 40 =
  33. 33.125 × 30 =
  34. 34.75 × 30 =
  35. 35.45 × 6 =
  36. 36.26 × 55 =
  37. 37.55 × 22 =
  38. 38.28 × 75 =
  39. 39.75 × 12 =
  40. 40.12 × 125 =

Answer key

  1. 1800
  2. 240
  3. 1400
  4. 1800
  5. 1120
  6. 600
  7. 550
  8. 150
  9. 1000
  10. 2080
  11. 900
  12. 420
  13. 990
  14. 2090
  15. 4000
  16. 90
  17. 630
  18. 950
  19. 1430
  20. 150
  21. 700
  22. 1210
  23. 420
  24. 1540
  25. 1260
  26. 280
  27. 1800
  28. 720
  29. 550
  30. 4250
  31. 90
  32. 5000
  33. 3750
  34. 2250
  35. 270
  36. 1430
  37. 1210
  38. 2100
  39. 900
  40. 1500

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