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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 385 · 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 × 14 =
  2. 2.125 × 18 =
  3. 3.25 × 38 =
  4. 4.6 × 25 =
  5. 5.36 × 25 =
  6. 6.75 × 26 =
  7. 7.35 × 38 =
  8. 8.35 × 8 =
  9. 9.125 × 10 =
  10. 10.26 × 125 =
  11. 11.75 × 40 =
  12. 12.35 × 22 =
  13. 13.22 × 125 =
  14. 14.6 × 25 =
  15. 15.10 × 35 =
  16. 16.15 × 22 =
  17. 17.35 × 26 =
  18. 18.22 × 75 =
  19. 19.8 × 25 =
  20. 20.6 × 15 =
  21. 21.65 × 12 =
  22. 22.45 × 10 =
  23. 23.35 × 20 =
  24. 24.125 × 8 =
  25. 25.55 × 34 =
  26. 26.15 × 6 =
  27. 27.15 × 8 =
  28. 28.65 × 20 =
  29. 29.15 × 20 =
  30. 30.55 × 20 =
  31. 31.15 × 30 =
  32. 32.34 × 55 =
  33. 33.15 × 16 =
  34. 34.20 × 75 =
  35. 35.10 × 15 =
  36. 36.45 × 20 =
  37. 37.15 × 10 =
  38. 38.25 × 34 =
  39. 39.18 × 15 =
  40. 40.8 × 25 =

Answer key

  1. 350
  2. 2250
  3. 950
  4. 150
  5. 900
  6. 1950
  7. 1330
  8. 280
  9. 1250
  10. 3250
  11. 3000
  12. 770
  13. 2750
  14. 150
  15. 350
  16. 330
  17. 910
  18. 1650
  19. 200
  20. 90
  21. 780
  22. 450
  23. 700
  24. 1000
  25. 1870
  26. 90
  27. 120
  28. 1300
  29. 300
  30. 1100
  31. 450
  32. 1870
  33. 240
  34. 1500
  35. 150
  36. 900
  37. 150
  38. 850
  39. 270
  40. 200

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