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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 324 · 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. 1.14 × 55 =
  2. 2.32 × 25 =
  3. 3.55 × 12 =
  4. 4.75 × 22 =
  5. 5.20 × 45 =
  6. 6.30 × 65 =
  7. 7.12 × 125 =
  8. 8.125 × 36 =
  9. 9.35 × 36 =
  10. 10.125 × 26 =
  11. 11.38 × 35 =
  12. 12.35 × 20 =
  13. 13.55 × 30 =
  14. 14.75 × 32 =
  15. 15.8 × 45 =
  16. 16.75 × 38 =
  17. 17.30 × 45 =
  18. 18.38 × 35 =
  19. 19.15 × 8 =
  20. 20.125 × 40 =
  21. 21.75 × 28 =
  22. 22.35 × 16 =
  23. 23.24 × 75 =
  24. 24.35 × 16 =
  25. 25.38 × 15 =
  26. 26.38 × 25 =
  27. 27.32 × 35 =
  28. 28.65 × 36 =
  29. 29.36 × 35 =
  30. 30.35 × 38 =
  31. 31.15 × 28 =
  32. 32.32 × 55 =
  33. 33.45 × 40 =
  34. 34.25 × 32 =
  35. 35.65 × 22 =
  36. 36.25 × 18 =
  37. 37.25 × 18 =
  38. 38.26 × 25 =
  39. 39.25 × 34 =
  40. 40.75 × 36 =

Answer key

  1. 770
  2. 800
  3. 660
  4. 1650
  5. 900
  6. 1950
  7. 1500
  8. 4500
  9. 1260
  10. 3250
  11. 1330
  12. 700
  13. 1650
  14. 2400
  15. 360
  16. 2850
  17. 1350
  18. 1330
  19. 120
  20. 5000
  21. 2100
  22. 560
  23. 1800
  24. 560
  25. 570
  26. 950
  27. 1120
  28. 2340
  29. 1260
  30. 1330
  31. 420
  32. 1760
  33. 1800
  34. 800
  35. 1430
  36. 450
  37. 450
  38. 650
  39. 850
  40. 2700

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