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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 225 · 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. 1.65 × 40 =
  2. 2.34 × 25 =
  3. 3.125 × 12 =
  4. 4.45 × 6 =
  5. 5.32 × 125 =
  6. 6.65 × 30 =
  7. 7.22 × 125 =
  8. 8.65 × 10 =
  9. 9.75 × 26 =
  10. 10.12 × 45 =
  11. 11.14 × 25 =
  12. 12.25 × 12 =
  13. 13.125 × 30 =
  14. 14.40 × 125 =
  15. 15.15 × 36 =
  16. 16.34 × 15 =
  17. 17.8 × 65 =
  18. 18.10 × 125 =
  19. 19.18 × 35 =
  20. 20.24 × 45 =
  21. 21.55 × 18 =
  22. 22.65 × 16 =
  23. 23.75 × 34 =
  24. 24.35 × 6 =
  25. 25.15 × 24 =
  26. 26.6 × 35 =
  27. 27.45 × 12 =
  28. 28.75 × 22 =
  29. 29.20 × 35 =
  30. 30.14 × 125 =
  31. 31.12 × 75 =
  32. 32.55 × 24 =
  33. 33.6 × 55 =
  34. 34.6 × 75 =
  35. 35.25 × 16 =
  36. 36.32 × 55 =
  37. 37.15 × 16 =
  38. 38.14 × 75 =
  39. 39.35 × 34 =
  40. 40.65 × 18 =

Answer key

  1. 2600
  2. 850
  3. 1500
  4. 270
  5. 4000
  6. 1950
  7. 2750
  8. 650
  9. 1950
  10. 540
  11. 350
  12. 300
  13. 3750
  14. 5000
  15. 540
  16. 510
  17. 520
  18. 1250
  19. 630
  20. 1080
  21. 990
  22. 1040
  23. 2550
  24. 210
  25. 360
  26. 210
  27. 540
  28. 1650
  29. 700
  30. 1750
  31. 900
  32. 1320
  33. 330
  34. 450
  35. 400
  36. 1760
  37. 240
  38. 1050
  39. 1190
  40. 1170

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