Répondre :
Réponse:
A=5/7-(3/2-5/4)
5/7-(6/4-5/4)
5/7-1/4
20/28-7/28
=13/28
B=(5/8+-7/4)-(-1/3-4/3)
(5/8+-14/8)-(-5/3)
-9/8+5/3
-18/16+30/16
12/16
Réponse:
A=5/7-(3/2-5/4)
5/7-(6/4-5/4)
5/7-1/4
20/28-7/28
=13/28
B=(5/8+-7/4)-(-1/3-4/3)
(5/8+-14/8)-(-5/3)
-9/8+5/3
-18/16+30/16
12/16