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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 480 · 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. 1.6 × 35 =
  2. 2.10 × 65 =
  3. 3.14 × 25 =
  4. 4.35 × 24 =
  5. 5.36 × 15 =
  6. 6.18 × 25 =
  7. 7.36 × 25 =
  8. 8.125 × 10 =
  9. 9.40 × 35 =
  10. 10.10 × 125 =
  11. 11.16 × 75 =
  12. 12.75 × 6 =
  13. 13.45 × 6 =
  14. 14.65 × 32 =
  15. 15.8 × 25 =
  16. 16.75 × 6 =
  17. 17.65 × 38 =
  18. 18.8 × 45 =
  19. 19.36 × 65 =
  20. 20.35 × 40 =
  21. 21.38 × 125 =
  22. 22.15 × 10 =
  23. 23.125 × 38 =
  24. 24.40 × 75 =
  25. 25.22 × 55 =
  26. 26.35 × 12 =
  27. 27.15 × 38 =
  28. 28.45 × 8 =
  29. 29.25 × 18 =
  30. 30.65 × 16 =
  31. 31.65 × 14 =
  32. 32.75 × 30 =
  33. 33.125 × 14 =
  34. 34.25 × 40 =
  35. 35.65 × 30 =
  36. 36.55 × 16 =
  37. 37.125 × 14 =
  38. 38.55 × 32 =
  39. 39.25 × 14 =
  40. 40.36 × 15 =

Answer key

  1. 210
  2. 650
  3. 350
  4. 840
  5. 540
  6. 450
  7. 900
  8. 1250
  9. 1400
  10. 1250
  11. 1200
  12. 450
  13. 270
  14. 2080
  15. 200
  16. 450
  17. 2470
  18. 360
  19. 2340
  20. 1400
  21. 4750
  22. 150
  23. 4750
  24. 3000
  25. 1210
  26. 420
  27. 570
  28. 360
  29. 450
  30. 1040
  31. 910
  32. 2250
  33. 1750
  34. 1000
  35. 1950
  36. 880
  37. 1750
  38. 1760
  39. 350
  40. 540

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