Répondre :
A=2/3-4/3x5/2
=2/3-20/6
=2/3-10/3
=-8/3
B=5+{1+1/8}:3/4
=5+(8/8+1/8)x4/3
=5+9/8x4/3
=5+36/24
=5+3/2
=10/2+3/2
=13/2
=2/3-20/6
=2/3-10/3
=-8/3
B=5+{1+1/8}:3/4
=5+(8/8+1/8)x4/3
=5+9/8x4/3
=5+36/24
=5+3/2
=10/2+3/2
=13/2