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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 834 · 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 × 34 =
  2. 2.75 × 18 =
  3. 3.15 × 22 =
  4. 4.45 × 8 =
  5. 5.36 × 15 =
  6. 6.6 × 125 =
  7. 7.34 × 25 =
  8. 8.32 × 35 =
  9. 9.25 × 12 =
  10. 10.125 × 38 =
  11. 11.40 × 65 =
  12. 12.20 × 55 =
  13. 13.8 × 75 =
  14. 14.28 × 15 =
  15. 15.16 × 15 =
  16. 16.15 × 38 =
  17. 17.25 × 32 =
  18. 18.75 × 14 =
  19. 19.38 × 125 =
  20. 20.65 × 36 =
  21. 21.40 × 45 =
  22. 22.32 × 65 =
  23. 23.45 × 16 =
  24. 24.34 × 25 =
  25. 25.24 × 15 =
  26. 26.45 × 12 =
  27. 27.35 × 24 =
  28. 28.36 × 125 =
  29. 29.22 × 45 =
  30. 30.75 × 24 =
  31. 31.25 × 24 =
  32. 32.26 × 25 =
  33. 33.8 × 125 =
  34. 34.15 × 34 =
  35. 35.8 × 25 =
  36. 36.75 × 16 =
  37. 37.15 × 12 =
  38. 38.8 × 55 =
  39. 39.15 × 20 =
  40. 40.28 × 75 =

Answer key

  1. 850
  2. 1350
  3. 330
  4. 360
  5. 540
  6. 750
  7. 850
  8. 1120
  9. 300
  10. 4750
  11. 2600
  12. 1100
  13. 600
  14. 420
  15. 240
  16. 570
  17. 800
  18. 1050
  19. 4750
  20. 2340
  21. 1800
  22. 2080
  23. 720
  24. 850
  25. 360
  26. 540
  27. 840
  28. 4500
  29. 990
  30. 1800
  31. 600
  32. 650
  33. 1000
  34. 510
  35. 200
  36. 1200
  37. 180
  38. 440
  39. 300
  40. 2100

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