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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 317 · 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. 1.35 × 6 =
  2. 2.12 × 15 =
  3. 3.45 × 34 =
  4. 4.65 × 20 =
  5. 5.55 × 8 =
  6. 6.20 × 65 =
  7. 7.125 × 16 =
  8. 8.35 × 38 =
  9. 9.8 × 55 =
  10. 10.40 × 75 =
  11. 11.30 × 35 =
  12. 12.15 × 18 =
  13. 13.35 × 34 =
  14. 14.14 × 125 =
  15. 15.65 × 14 =
  16. 16.20 × 25 =
  17. 17.10 × 25 =
  18. 18.16 × 15 =
  19. 19.38 × 125 =
  20. 20.30 × 15 =
  21. 21.34 × 25 =
  22. 22.8 × 25 =
  23. 23.25 × 22 =
  24. 24.15 × 6 =
  25. 25.25 × 38 =
  26. 26.15 × 12 =
  27. 27.35 × 28 =
  28. 28.38 × 75 =
  29. 29.14 × 15 =
  30. 30.125 × 40 =
  31. 31.35 × 6 =
  32. 32.25 × 28 =
  33. 33.32 × 35 =
  34. 34.10 × 45 =
  35. 35.125 × 18 =
  36. 36.125 × 20 =
  37. 37.30 × 55 =
  38. 38.65 × 22 =
  39. 39.38 × 35 =
  40. 40.75 × 40 =

Answer key

  1. 210
  2. 180
  3. 1530
  4. 1300
  5. 440
  6. 1300
  7. 2000
  8. 1330
  9. 440
  10. 3000
  11. 1050
  12. 270
  13. 1190
  14. 1750
  15. 910
  16. 500
  17. 250
  18. 240
  19. 4750
  20. 450
  21. 850
  22. 200
  23. 550
  24. 90
  25. 950
  26. 180
  27. 980
  28. 2850
  29. 210
  30. 5000
  31. 210
  32. 700
  33. 1120
  34. 450
  35. 2250
  36. 2500
  37. 1650
  38. 1430
  39. 1330
  40. 3000

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