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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 527 · 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. 2.15 × 20 =
  3. 3.32 × 125 =
  4. 4.25 × 28 =
  5. 5.15 × 12 =
  6. 6.6 × 15 =
  7. 7.6 × 55 =
  8. 8.12 × 75 =
  9. 9.125 × 20 =
  10. 10.75 × 36 =
  11. 11.16 × 15 =
  12. 12.25 × 14 =
  13. 13.12 × 25 =
  14. 14.22 × 45 =
  15. 15.8 × 55 =
  16. 16.38 × 15 =
  17. 17.40 × 75 =
  18. 18.10 × 55 =
  19. 19.18 × 75 =
  20. 20.15 × 40 =
  21. 21.26 × 35 =
  22. 22.55 × 34 =
  23. 23.25 × 20 =
  24. 24.45 × 36 =
  25. 25.32 × 35 =
  26. 26.36 × 65 =
  27. 27.125 × 8 =
  28. 28.32 × 15 =
  29. 29.24 × 45 =
  30. 30.26 × 35 =
  31. 31.45 × 34 =
  32. 32.8 × 55 =
  33. 33.45 × 38 =
  34. 34.8 × 15 =
  35. 35.55 × 6 =
  36. 36.34 × 65 =
  37. 37.38 × 25 =
  38. 38.45 × 12 =
  39. 39.15 × 10 =
  40. 40.55 × 22 =

Answer key

  1. 400
  2. 300
  3. 4000
  4. 700
  5. 180
  6. 90
  7. 330
  8. 900
  9. 2500
  10. 2700
  11. 240
  12. 350
  13. 300
  14. 990
  15. 440
  16. 570
  17. 3000
  18. 550
  19. 1350
  20. 600
  21. 910
  22. 1870
  23. 500
  24. 1620
  25. 1120
  26. 2340
  27. 1000
  28. 480
  29. 1080
  30. 910
  31. 1530
  32. 440
  33. 1710
  34. 120
  35. 330
  36. 2210
  37. 950
  38. 540
  39. 150
  40. 1210

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