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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 434 · 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 × 12 =
  2. 2.6 × 35 =
  3. 3.15 × 10 =
  4. 4.25 × 18 =
  5. 5.18 × 15 =
  6. 6.25 × 28 =
  7. 7.8 × 55 =
  8. 8.125 × 32 =
  9. 9.14 × 45 =
  10. 10.32 × 75 =
  11. 11.25 × 34 =
  12. 12.65 × 6 =
  13. 13.35 × 14 =
  14. 14.30 × 45 =
  15. 15.8 × 25 =
  16. 16.65 × 16 =
  17. 17.35 × 40 =
  18. 18.65 × 20 =
  19. 19.55 × 34 =
  20. 20.24 × 25 =
  21. 21.40 × 55 =
  22. 22.25 × 8 =
  23. 23.8 × 45 =
  24. 24.18 × 35 =
  25. 25.8 × 35 =
  26. 26.34 × 25 =
  27. 27.55 × 18 =
  28. 28.24 × 125 =
  29. 29.22 × 45 =
  30. 30.20 × 75 =
  31. 31.35 × 8 =
  32. 32.18 × 25 =
  33. 33.25 × 12 =
  34. 34.34 × 35 =
  35. 35.24 × 15 =
  36. 36.12 × 65 =
  37. 37.65 × 24 =
  38. 38.30 × 45 =
  39. 39.38 × 45 =
  40. 40.34 × 65 =

Answer key

  1. 180
  2. 210
  3. 150
  4. 450
  5. 270
  6. 700
  7. 440
  8. 4000
  9. 630
  10. 2400
  11. 850
  12. 390
  13. 490
  14. 1350
  15. 200
  16. 1040
  17. 1400
  18. 1300
  19. 1870
  20. 600
  21. 2200
  22. 200
  23. 360
  24. 630
  25. 280
  26. 850
  27. 990
  28. 3000
  29. 990
  30. 1500
  31. 280
  32. 450
  33. 300
  34. 1190
  35. 360
  36. 780
  37. 1560
  38. 1350
  39. 1710
  40. 2210

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