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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 283 · 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 × 24 =
  2. 2.25 × 12 =
  3. 3.8 × 15 =
  4. 4.18 × 35 =
  5. 5.8 × 65 =
  6. 6.16 × 45 =
  7. 7.8 × 45 =
  8. 8.6 × 35 =
  9. 9.125 × 16 =
  10. 10.12 × 35 =
  11. 11.6 × 35 =
  12. 12.32 × 65 =
  13. 13.15 × 16 =
  14. 14.14 × 55 =
  15. 15.15 × 40 =
  16. 16.125 × 38 =
  17. 17.18 × 35 =
  18. 18.24 × 35 =
  19. 19.35 × 36 =
  20. 20.24 × 15 =
  21. 21.25 × 20 =
  22. 22.12 × 15 =
  23. 23.15 × 10 =
  24. 24.8 × 55 =
  25. 25.75 × 8 =
  26. 26.30 × 125 =
  27. 27.34 × 65 =
  28. 28.22 × 75 =
  29. 29.75 × 30 =
  30. 30.28 × 35 =
  31. 31.25 × 26 =
  32. 32.35 × 28 =
  33. 33.24 × 125 =
  34. 34.24 × 45 =
  35. 35.125 × 34 =
  36. 36.65 × 24 =
  37. 37.35 × 32 =
  38. 38.65 × 18 =
  39. 39.75 × 16 =
  40. 40.8 × 25 =

Answer key

  1. 600
  2. 300
  3. 120
  4. 630
  5. 520
  6. 720
  7. 360
  8. 210
  9. 2000
  10. 420
  11. 210
  12. 2080
  13. 240
  14. 770
  15. 600
  16. 4750
  17. 630
  18. 840
  19. 1260
  20. 360
  21. 500
  22. 180
  23. 150
  24. 440
  25. 600
  26. 3750
  27. 2210
  28. 1650
  29. 2250
  30. 980
  31. 650
  32. 980
  33. 3000
  34. 1080
  35. 4250
  36. 1560
  37. 1120
  38. 1170
  39. 1200
  40. 200

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