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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 323 · 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. 1.40 × 55 =
  2. 2.35 × 26 =
  3. 3.28 × 25 =
  4. 4.38 × 65 =
  5. 5.75 × 38 =
  6. 6.8 × 35 =
  7. 7.40 × 35 =
  8. 8.20 × 15 =
  9. 9.15 × 10 =
  10. 10.28 × 45 =
  11. 11.65 × 10 =
  12. 12.34 × 125 =
  13. 13.55 × 32 =
  14. 14.22 × 75 =
  15. 15.36 × 55 =
  16. 16.15 × 24 =
  17. 17.15 × 16 =
  18. 18.125 × 28 =
  19. 19.65 × 10 =
  20. 20.125 × 6 =
  21. 21.65 × 16 =
  22. 22.15 × 18 =
  23. 23.35 × 12 =
  24. 24.12 × 125 =
  25. 25.45 × 24 =
  26. 26.35 × 38 =
  27. 27.65 × 22 =
  28. 28.8 × 65 =
  29. 29.16 × 75 =
  30. 30.30 × 45 =
  31. 31.28 × 15 =
  32. 32.25 × 16 =
  33. 33.14 × 45 =
  34. 34.55 × 14 =
  35. 35.125 × 10 =
  36. 36.15 × 10 =
  37. 37.36 × 25 =
  38. 38.8 × 25 =
  39. 39.22 × 125 =
  40. 40.12 × 75 =

Answer key

  1. 2200
  2. 910
  3. 700
  4. 2470
  5. 2850
  6. 280
  7. 1400
  8. 300
  9. 150
  10. 1260
  11. 650
  12. 4250
  13. 1760
  14. 1650
  15. 1980
  16. 360
  17. 240
  18. 3500
  19. 650
  20. 750
  21. 1040
  22. 270
  23. 420
  24. 1500
  25. 1080
  26. 1330
  27. 1430
  28. 520
  29. 1200
  30. 1350
  31. 420
  32. 400
  33. 630
  34. 770
  35. 1250
  36. 150
  37. 900
  38. 200
  39. 2750
  40. 900

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