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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 214 · 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. 2.125 × 26 =
  3. 3.55 × 40 =
  4. 4.10 × 75 =
  5. 5.55 × 6 =
  6. 6.45 × 8 =
  7. 7.125 × 36 =
  8. 8.36 × 15 =
  9. 9.125 × 22 =
  10. 10.28 × 45 =
  11. 11.12 × 75 =
  12. 12.28 × 65 =
  13. 13.15 × 28 =
  14. 14.22 × 125 =
  15. 15.35 × 10 =
  16. 16.6 × 45 =
  17. 17.125 × 14 =
  18. 18.32 × 125 =
  19. 19.6 × 25 =
  20. 20.25 × 22 =
  21. 21.25 × 24 =
  22. 22.18 × 125 =
  23. 23.35 × 18 =
  24. 24.75 × 16 =
  25. 25.25 × 28 =
  26. 26.15 × 16 =
  27. 27.15 × 16 =
  28. 28.25 × 12 =
  29. 29.45 × 12 =
  30. 30.125 × 24 =
  31. 31.30 × 25 =
  32. 32.75 × 38 =
  33. 33.16 × 75 =
  34. 34.8 × 45 =
  35. 35.65 × 30 =
  36. 36.16 × 25 =
  37. 37.75 × 14 =
  38. 38.6 × 35 =
  39. 39.65 × 34 =
  40. 40.28 × 125 =

Answer key

  1. 210
  2. 3250
  3. 2200
  4. 750
  5. 330
  6. 360
  7. 4500
  8. 540
  9. 2750
  10. 1260
  11. 900
  12. 1820
  13. 420
  14. 2750
  15. 350
  16. 270
  17. 1750
  18. 4000
  19. 150
  20. 550
  21. 600
  22. 2250
  23. 630
  24. 1200
  25. 700
  26. 240
  27. 240
  28. 300
  29. 540
  30. 3000
  31. 750
  32. 2850
  33. 1200
  34. 360
  35. 1950
  36. 400
  37. 1050
  38. 210
  39. 2210
  40. 3500

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