Effectue les calculs suivants respectant les priorités opératoires a = 1/5 x -4/3 + 7/2 b : 4/5 ÷ ( -3/7) - 7/10 c : 13/7 6 ( -8/7 ) ÷ (-4/5) d : 7/3 + 3/2 x -1

bonsoir

a = - 4/15 + 7/2
a = - 8/30 + 105/30
a = 97/30

b = 4/5 x - 3/3 - 7/10
b = - 12/15 - 7/10
b = - 24/30 - 21/30
b = - 45/30 = - 3/2

c = 13/76 ?

d = 7/3 + 3/2 x - 10/21
d = 7/3 - 30/42
d = 98/42 - 30/42 = 68/42 = 34/21

e = 5/8 - 3/4 x - 16/9
e = 5/8 + 48/36
e = 5/8 + 4/3
e = 15/24 + 32/24
e = 47/24

f=  6/5 - ( -1/9) x ( -3/4 )
f = 6/5 - ( 3/36)
f = 6/5 + 3/36
f = 6/5 + 1/12
f = 72/60 + 5/60 
f = 77/60