Merçi de m'aider est ce la bonne reponse A=1-2+3-4+5-6+7-8
A=16-20
A=-4
B=(-13)+(-17)+30-(-25)
B=-55+30
B=-25
C=6,5-2,7+13,5-8,3+6,4
C=26,4-11
C=15,4
D=(-0,12)+(-3,45)-(-1,12)-(-2,45)
D=-7,14
merçi de me repondre  est ce que j'ai bien fais 
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