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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 662 · 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. 1.34 × 55 =
  2. 2.20 × 125 =
  3. 3.24 × 25 =
  4. 4.45 × 26 =
  5. 5.45 × 14 =
  6. 6.55 × 20 =
  7. 7.24 × 25 =
  8. 8.45 × 16 =
  9. 9.125 × 10 =
  10. 10.15 × 12 =
  11. 11.125 × 28 =
  12. 12.25 × 10 =
  13. 13.65 × 34 =
  14. 14.18 × 75 =
  15. 15.32 × 65 =
  16. 16.125 × 40 =
  17. 17.8 × 45 =
  18. 18.15 × 34 =
  19. 19.65 × 40 =
  20. 20.15 × 6 =
  21. 21.8 × 55 =
  22. 22.25 × 36 =
  23. 23.40 × 45 =
  24. 24.12 × 45 =
  25. 25.45 × 20 =
  26. 26.20 × 65 =
  27. 27.65 × 40 =
  28. 28.14 × 15 =
  29. 29.45 × 10 =
  30. 30.40 × 55 =
  31. 31.15 × 26 =
  32. 32.75 × 6 =
  33. 33.55 × 6 =
  34. 34.38 × 125 =
  35. 35.12 × 35 =
  36. 36.75 × 8 =
  37. 37.14 × 55 =
  38. 38.32 × 35 =
  39. 39.8 × 65 =
  40. 40.10 × 35 =

Answer key

  1. 1870
  2. 2500
  3. 600
  4. 1170
  5. 630
  6. 1100
  7. 600
  8. 720
  9. 1250
  10. 180
  11. 3500
  12. 250
  13. 2210
  14. 1350
  15. 2080
  16. 5000
  17. 360
  18. 510
  19. 2600
  20. 90
  21. 440
  22. 900
  23. 1800
  24. 540
  25. 900
  26. 1300
  27. 2600
  28. 210
  29. 450
  30. 2200
  31. 390
  32. 450
  33. 330
  34. 4750
  35. 420
  36. 600
  37. 770
  38. 1120
  39. 520
  40. 350

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