Calcule astucieusement chaque expression :
A= (-8)+(+6)-(-7)-(+9)-(-2)
B= -15+8-(-6)-4+9
C=(-3+4)-(-7+6)+(-8-2)
D=(-10.78)+(2.75)+(1.75)+(+10.78)
A= (-8)+(+6)-(-7)-(+9)-(-2)
B= -15+8-(-6)-4+9
C=(-3+4)-(-7+6)+(-8-2)
D=(-10.78)+(2.75)+(1.75)+(+10.78)
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Verified answer
A = -8+6+7-9+2A = -2-2+2 = -2
B = -15+8+6-4+9
B = -15+8+2+9
B = -15+10+9
B = -5+9
B = 4
C = 1 - (-1) + (-10)
C = 1+1-10
C = 2-10
C = -8
D = -10,78+2,75+1,75+10,78
D = -10,78+10,78+2,75+1,75
D = 0+2,75+1,75
D = 4,5
A= (-8)+(+6)-(-7)-(+9)-(-2)
A=-8+6+7-9+2=
A=-17+15
A=-2
B= -15+8-(-6)-4+9
B=-15+8+6-4+9
B=-19+23
B=4
C=(-3+4)-(-7+6)+(-8-2)
C=1+1-10
C=-10+2
C=-8
D=(-10.78)+(2.75)+(1.75)+(+10.78)
D=-10,78+2,75+1,75+10,78
D=4,50
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