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Sagot :

À=1x1/2x2+3x1/4x1=1/4+3/4=4/4=1
A=(1/2)+(3/4)
À=( 8/4) + (2/3)
À=(11/4)

B=(5/6)/(5/9)
B=(5/6)*(9/5)
B=3/2

C=10-[-2(2-3)+5]
C=10-[-2*-1+5]
C=10-[2+5]
C=10-10
C=0

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