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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 762 · 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. 1.15 × 14 =
  2. 2.65 × 32 =
  3. 3.40 × 15 =
  4. 4.15 × 26 =
  5. 5.15 × 12 =
  6. 6.15 × 6 =
  7. 7.125 × 14 =
  8. 8.125 × 18 =
  9. 9.75 × 40 =
  10. 10.25 × 18 =
  11. 11.32 × 15 =
  12. 12.15 × 26 =
  13. 13.55 × 14 =
  14. 14.75 × 16 =
  15. 15.25 × 10 =
  16. 16.125 × 20 =
  17. 17.15 × 20 =
  18. 18.65 × 18 =
  19. 19.25 × 6 =
  20. 20.55 × 30 =
  21. 21.30 × 45 =
  22. 22.12 × 25 =
  23. 23.75 × 26 =
  24. 24.8 × 15 =
  25. 25.28 × 15 =
  26. 26.24 × 75 =
  27. 27.36 × 75 =
  28. 28.75 × 34 =
  29. 29.75 × 38 =
  30. 30.125 × 14 =
  31. 31.26 × 125 =
  32. 32.125 × 32 =
  33. 33.35 × 24 =
  34. 34.15 × 24 =
  35. 35.14 × 65 =
  36. 36.30 × 65 =
  37. 37.15 × 14 =
  38. 38.45 × 14 =
  39. 39.125 × 32 =
  40. 40.55 × 30 =

Answer key

  1. 210
  2. 2080
  3. 600
  4. 390
  5. 180
  6. 90
  7. 1750
  8. 2250
  9. 3000
  10. 450
  11. 480
  12. 390
  13. 770
  14. 1200
  15. 250
  16. 2500
  17. 300
  18. 1170
  19. 150
  20. 1650
  21. 1350
  22. 300
  23. 1950
  24. 120
  25. 420
  26. 1800
  27. 2700
  28. 2550
  29. 2850
  30. 1750
  31. 3250
  32. 4000
  33. 840
  34. 360
  35. 910
  36. 1950
  37. 210
  38. 630
  39. 4000
  40. 1650

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