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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 3 · 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. 1.40 × 55 =
  2. 2.65 × 8 =
  3. 3.45 × 6 =
  4. 4.25 × 18 =
  5. 5.40 × 45 =
  6. 6.75 × 16 =
  7. 7.55 × 34 =
  8. 8.30 × 75 =
  9. 9.8 × 15 =
  10. 10.65 × 14 =
  11. 11.65 × 6 =
  12. 12.25 × 30 =
  13. 13.40 × 35 =
  14. 14.25 × 30 =
  15. 15.38 × 15 =
  16. 16.40 × 25 =
  17. 17.75 × 32 =
  18. 18.40 × 15 =
  19. 19.55 × 40 =
  20. 20.45 × 10 =
  21. 21.40 × 75 =
  22. 22.75 × 32 =
  23. 23.22 × 55 =
  24. 24.12 × 15 =
  25. 25.25 × 6 =
  26. 26.30 × 25 =
  27. 27.15 × 18 =
  28. 28.25 × 24 =
  29. 29.25 × 24 =
  30. 30.36 × 75 =
  31. 31.35 × 8 =
  32. 32.40 × 15 =
  33. 33.35 × 12 =
  34. 34.26 × 25 =
  35. 35.125 × 40 =
  36. 36.15 × 30 =
  37. 37.38 × 25 =
  38. 38.6 × 125 =
  39. 39.26 × 45 =
  40. 40.25 × 34 =

Answer key

  1. 2200
  2. 520
  3. 270
  4. 450
  5. 1800
  6. 1200
  7. 1870
  8. 2250
  9. 120
  10. 910
  11. 390
  12. 750
  13. 1400
  14. 750
  15. 570
  16. 1000
  17. 2400
  18. 600
  19. 2200
  20. 450
  21. 3000
  22. 2400
  23. 1210
  24. 180
  25. 150
  26. 750
  27. 270
  28. 600
  29. 600
  30. 2700
  31. 280
  32. 600
  33. 420
  34. 650
  35. 5000
  36. 450
  37. 950
  38. 750
  39. 1170
  40. 850

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