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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 622 · 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 × 20 =
  2. 2.26 × 45 =
  3. 3.15 × 16 =
  4. 4.55 × 6 =
  5. 5.22 × 25 =
  6. 6.40 × 65 =
  7. 7.14 × 15 =
  8. 8.38 × 75 =
  9. 9.36 × 125 =
  10. 10.10 × 15 =
  11. 11.18 × 35 =
  12. 12.55 × 24 =
  13. 13.12 × 25 =
  14. 14.35 × 36 =
  15. 15.12 × 65 =
  16. 16.55 × 16 =
  17. 17.24 × 75 =
  18. 18.65 × 24 =
  19. 19.22 × 35 =
  20. 20.24 × 55 =
  21. 21.14 × 55 =
  22. 22.8 × 35 =
  23. 23.35 × 6 =
  24. 24.16 × 15 =
  25. 25.45 × 30 =
  26. 26.8 × 25 =
  27. 27.55 × 20 =
  28. 28.55 × 18 =
  29. 29.125 × 36 =
  30. 30.55 × 40 =
  31. 31.16 × 45 =
  32. 32.15 × 6 =
  33. 33.36 × 25 =
  34. 34.45 × 12 =
  35. 35.45 × 28 =
  36. 36.10 × 65 =
  37. 37.75 × 8 =
  38. 38.35 × 28 =
  39. 39.25 × 30 =
  40. 40.40 × 55 =

Answer key

  1. 500
  2. 1170
  3. 240
  4. 330
  5. 550
  6. 2600
  7. 210
  8. 2850
  9. 4500
  10. 150
  11. 630
  12. 1320
  13. 300
  14. 1260
  15. 780
  16. 880
  17. 1800
  18. 1560
  19. 770
  20. 1320
  21. 770
  22. 280
  23. 210
  24. 240
  25. 1350
  26. 200
  27. 1100
  28. 990
  29. 4500
  30. 2200
  31. 720
  32. 90
  33. 900
  34. 540
  35. 1260
  36. 650
  37. 600
  38. 980
  39. 750
  40. 2200

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