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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 358 · 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. 1.75 × 8 =
  2. 2.14 × 25 =
  3. 3.22 × 55 =
  4. 4.32 × 15 =
  5. 5.35 × 10 =
  6. 6.35 × 10 =
  7. 7.12 × 25 =
  8. 8.45 × 6 =
  9. 9.8 × 65 =
  10. 10.10 × 55 =
  11. 11.24 × 15 =
  12. 12.10 × 125 =
  13. 13.14 × 75 =
  14. 14.12 × 75 =
  15. 15.26 × 45 =
  16. 16.125 × 12 =
  17. 17.14 × 125 =
  18. 18.15 × 24 =
  19. 19.15 × 30 =
  20. 20.75 × 40 =
  21. 21.15 × 32 =
  22. 22.125 × 8 =
  23. 23.75 × 24 =
  24. 24.28 × 25 =
  25. 25.55 × 8 =
  26. 26.65 × 26 =
  27. 27.65 × 10 =
  28. 28.15 × 36 =
  29. 29.45 × 12 =
  30. 30.25 × 6 =
  31. 31.12 × 65 =
  32. 32.15 × 14 =
  33. 33.25 × 12 =
  34. 34.38 × 25 =
  35. 35.65 × 12 =
  36. 36.28 × 125 =
  37. 37.20 × 45 =
  38. 38.65 × 6 =
  39. 39.40 × 15 =
  40. 40.15 × 6 =

Answer key

  1. 600
  2. 350
  3. 1210
  4. 480
  5. 350
  6. 350
  7. 300
  8. 270
  9. 520
  10. 550
  11. 360
  12. 1250
  13. 1050
  14. 900
  15. 1170
  16. 1500
  17. 1750
  18. 360
  19. 450
  20. 3000
  21. 480
  22. 1000
  23. 1800
  24. 700
  25. 440
  26. 1690
  27. 650
  28. 540
  29. 540
  30. 150
  31. 780
  32. 210
  33. 300
  34. 950
  35. 780
  36. 3500
  37. 900
  38. 390
  39. 600
  40. 90

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