effectuer les calculs suivants (on simplifiera dès que possible)
a=2/3+7/3 X -9/4 ;
b=(2-5/8)÷3/4 ;
c= 7/8/1/-4
a=2/3+7/3 X -9/4 ;
b=(2-5/8)÷3/4 ;
c= 7/8/1/-4
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bonjour
a. 2/3 + 7/3 x - 9/4
= 2/3 - 63/12
= 8/12 - 63/12
= - 55/12
b. ( 2 - 5/8 ) : 3/4
= ( 16/8 - 5 /8 ) x 4/3
= 11 /8 x 4 /3
= 44/24
= 11/6
c = 7/8 : - 1 /4
= 7/8 x - 4
= - 28/8
= - 3.5
9/3*-9/4=-27/4=-6,75
B: jsp
C:7/8+-1/4=5/8=0.625