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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 615 · 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. 1.6 × 35 =
  2. 2.12 × 125 =
  3. 3.75 × 38 =
  4. 4.15 × 10 =
  5. 5.75 × 8 =
  6. 6.15 × 28 =
  7. 7.18 × 25 =
  8. 8.45 × 16 =
  9. 9.8 × 75 =
  10. 10.24 × 45 =
  11. 11.6 × 75 =
  12. 12.38 × 35 =
  13. 13.8 × 35 =
  14. 14.12 × 75 =
  15. 15.32 × 75 =
  16. 16.15 × 22 =
  17. 17.45 × 16 =
  18. 18.14 × 35 =
  19. 19.65 × 28 =
  20. 20.22 × 65 =
  21. 21.65 × 12 =
  22. 22.8 × 75 =
  23. 23.65 × 32 =
  24. 24.15 × 38 =
  25. 25.45 × 10 =
  26. 26.55 × 32 =
  27. 27.10 × 45 =
  28. 28.75 × 28 =
  29. 29.34 × 55 =
  30. 30.14 × 65 =
  31. 31.40 × 25 =
  32. 32.32 × 45 =
  33. 33.55 × 10 =
  34. 34.125 × 32 =
  35. 35.125 × 14 =
  36. 36.36 × 125 =
  37. 37.26 × 55 =
  38. 38.16 × 15 =
  39. 39.15 × 8 =
  40. 40.25 × 14 =

Answer key

  1. 210
  2. 1500
  3. 2850
  4. 150
  5. 600
  6. 420
  7. 450
  8. 720
  9. 600
  10. 1080
  11. 450
  12. 1330
  13. 280
  14. 900
  15. 2400
  16. 330
  17. 720
  18. 490
  19. 1820
  20. 1430
  21. 780
  22. 600
  23. 2080
  24. 570
  25. 450
  26. 1760
  27. 450
  28. 2100
  29. 1870
  30. 910
  31. 1000
  32. 1440
  33. 550
  34. 4000
  35. 1750
  36. 4500
  37. 1430
  38. 240
  39. 120
  40. 350

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