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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 530 · 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 × 22 =
  2. 2.75 × 26 =
  3. 3.35 × 10 =
  4. 4.36 × 55 =
  5. 5.22 × 55 =
  6. 6.38 × 25 =
  7. 7.125 × 32 =
  8. 8.35 × 36 =
  9. 9.75 × 38 =
  10. 10.75 × 6 =
  11. 11.75 × 22 =
  12. 12.65 × 12 =
  13. 13.25 × 32 =
  14. 14.36 × 25 =
  15. 15.30 × 25 =
  16. 16.32 × 55 =
  17. 17.15 × 32 =
  18. 18.12 × 45 =
  19. 19.24 × 15 =
  20. 20.40 × 75 =
  21. 21.22 × 35 =
  22. 22.125 × 8 =
  23. 23.6 × 125 =
  24. 24.35 × 14 =
  25. 25.35 × 26 =
  26. 26.32 × 15 =
  27. 27.25 × 14 =
  28. 28.8 × 15 =
  29. 29.36 × 65 =
  30. 30.35 × 32 =
  31. 31.38 × 25 =
  32. 32.35 × 16 =
  33. 33.36 × 45 =
  34. 34.125 × 36 =
  35. 35.32 × 25 =
  36. 36.35 × 18 =
  37. 37.40 × 35 =
  38. 38.35 × 16 =
  39. 39.75 × 18 =
  40. 40.22 × 45 =

Answer key

  1. 1650
  2. 1950
  3. 350
  4. 1980
  5. 1210
  6. 950
  7. 4000
  8. 1260
  9. 2850
  10. 450
  11. 1650
  12. 780
  13. 800
  14. 900
  15. 750
  16. 1760
  17. 480
  18. 540
  19. 360
  20. 3000
  21. 770
  22. 1000
  23. 750
  24. 490
  25. 910
  26. 480
  27. 350
  28. 120
  29. 2340
  30. 1120
  31. 950
  32. 560
  33. 1620
  34. 4500
  35. 800
  36. 630
  37. 1400
  38. 560
  39. 1350
  40. 990

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