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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 275 · 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. 1.25 × 16 =
  2. 2.36 × 125 =
  3. 3.45 × 34 =
  4. 4.55 × 10 =
  5. 5.125 × 18 =
  6. 6.12 × 75 =
  7. 7.125 × 40 =
  8. 8.8 × 25 =
  9. 9.26 × 55 =
  10. 10.125 × 8 =
  11. 11.32 × 35 =
  12. 12.25 × 36 =
  13. 13.45 × 32 =
  14. 14.75 × 28 =
  15. 15.25 × 40 =
  16. 16.15 × 22 =
  17. 17.25 × 8 =
  18. 18.15 × 12 =
  19. 19.45 × 6 =
  20. 20.75 × 6 =
  21. 21.24 × 45 =
  22. 22.32 × 45 =
  23. 23.55 × 10 =
  24. 24.15 × 38 =
  25. 25.20 × 75 =
  26. 26.75 × 16 =
  27. 27.55 × 16 =
  28. 28.8 × 35 =
  29. 29.30 × 125 =
  30. 30.20 × 65 =
  31. 31.45 × 10 =
  32. 32.20 × 15 =
  33. 33.30 × 75 =
  34. 34.25 × 20 =
  35. 35.125 × 40 =
  36. 36.24 × 35 =
  37. 37.18 × 25 =
  38. 38.45 × 30 =
  39. 39.40 × 15 =
  40. 40.35 × 6 =

Answer key

  1. 400
  2. 4500
  3. 1530
  4. 550
  5. 2250
  6. 900
  7. 5000
  8. 200
  9. 1430
  10. 1000
  11. 1120
  12. 900
  13. 1440
  14. 2100
  15. 1000
  16. 330
  17. 200
  18. 180
  19. 270
  20. 450
  21. 1080
  22. 1440
  23. 550
  24. 570
  25. 1500
  26. 1200
  27. 880
  28. 280
  29. 3750
  30. 1300
  31. 450
  32. 300
  33. 2250
  34. 500
  35. 5000
  36. 840
  37. 450
  38. 1350
  39. 600
  40. 210

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