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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 619 · 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. 1.22 × 65 =
  2. 2.8 × 75 =
  3. 3.75 × 26 =
  4. 4.55 × 26 =
  5. 5.38 × 35 =
  6. 6.45 × 34 =
  7. 7.45 × 10 =
  8. 8.14 × 35 =
  9. 9.55 × 22 =
  10. 10.38 × 75 =
  11. 11.35 × 16 =
  12. 12.16 × 55 =
  13. 13.16 × 25 =
  14. 14.125 × 24 =
  15. 15.25 × 24 =
  16. 16.45 × 24 =
  17. 17.10 × 125 =
  18. 18.45 × 30 =
  19. 19.125 × 16 =
  20. 20.22 × 65 =
  21. 21.75 × 36 =
  22. 22.75 × 16 =
  23. 23.16 × 15 =
  24. 24.25 × 28 =
  25. 25.55 × 34 =
  26. 26.32 × 25 =
  27. 27.8 × 35 =
  28. 28.22 × 15 =
  29. 29.25 × 32 =
  30. 30.35 × 6 =
  31. 31.14 × 35 =
  32. 32.125 × 22 =
  33. 33.8 × 35 =
  34. 34.55 × 10 =
  35. 35.125 × 18 =
  36. 36.75 × 14 =
  37. 37.28 × 75 =
  38. 38.26 × 35 =
  39. 39.18 × 125 =
  40. 40.55 × 36 =

Answer key

  1. 1430
  2. 600
  3. 1950
  4. 1430
  5. 1330
  6. 1530
  7. 450
  8. 490
  9. 1210
  10. 2850
  11. 560
  12. 880
  13. 400
  14. 3000
  15. 600
  16. 1080
  17. 1250
  18. 1350
  19. 2000
  20. 1430
  21. 2700
  22. 1200
  23. 240
  24. 700
  25. 1870
  26. 800
  27. 280
  28. 330
  29. 800
  30. 210
  31. 490
  32. 2750
  33. 280
  34. 550
  35. 2250
  36. 1050
  37. 2100
  38. 910
  39. 2250
  40. 1980

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