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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 814 · 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. 1.26 × 75 =
  2. 2.15 × 18 =
  3. 3.36 × 55 =
  4. 4.16 × 35 =
  5. 5.10 × 65 =
  6. 6.35 × 16 =
  7. 7.65 × 38 =
  8. 8.30 × 75 =
  9. 9.28 × 25 =
  10. 10.22 × 35 =
  11. 11.30 × 35 =
  12. 12.22 × 45 =
  13. 13.65 × 14 =
  14. 14.24 × 15 =
  15. 15.16 × 125 =
  16. 16.22 × 35 =
  17. 17.15 × 36 =
  18. 18.28 × 45 =
  19. 19.55 × 10 =
  20. 20.15 × 28 =
  21. 21.15 × 20 =
  22. 22.18 × 75 =
  23. 23.35 × 28 =
  24. 24.32 × 45 =
  25. 25.45 × 16 =
  26. 26.36 × 45 =
  27. 27.15 × 14 =
  28. 28.75 × 28 =
  29. 29.55 × 8 =
  30. 30.15 × 38 =
  31. 31.55 × 28 =
  32. 32.14 × 15 =
  33. 33.65 × 14 =
  34. 34.65 × 12 =
  35. 35.35 × 10 =
  36. 36.125 × 10 =
  37. 37.125 × 38 =
  38. 38.16 × 45 =
  39. 39.28 × 125 =
  40. 40.18 × 15 =

Answer key

  1. 1950
  2. 270
  3. 1980
  4. 560
  5. 650
  6. 560
  7. 2470
  8. 2250
  9. 700
  10. 770
  11. 1050
  12. 990
  13. 910
  14. 360
  15. 2000
  16. 770
  17. 540
  18. 1260
  19. 550
  20. 420
  21. 300
  22. 1350
  23. 980
  24. 1440
  25. 720
  26. 1620
  27. 210
  28. 2100
  29. 440
  30. 570
  31. 1540
  32. 210
  33. 910
  34. 780
  35. 350
  36. 1250
  37. 4750
  38. 720
  39. 3500
  40. 270

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