1. 2/3 -1/4 =
   • 6/7 - 2/7 = 4/7
   • 8/12 - 3/12 = 5/12
   • 2/12 - 1/12 = 1/12
2. 5/6 – 3/4 =
   • 6/24 - 3/24 = 3/24 = 1/8
   • 20/24 - 18/24 = 22/4 = 1/12
   • 15/24 - 3/24 = 12/24 = 1/2
3. 7/9 – 1/6 =
   • 7/15 -1/15 = 6/15
   • 42/54 - 9/54 = 33/54 = 11/18
   • 7/54 - 1/54 = 6/54 = 2/18
4. 4/5 – 1/7 =
   • 4/35 - 1/35 = 3/35
   • 28/35 - 5/35 = 23/35
   • 4/12 - 1/12 = 3/12 = 1/4

Volver a: Resta de fracciones con distinto denominador