Exercice 5
Supprimez les parenthèses et simplifiez les expressions.
A = (3 + a) – (-5 + 4a)
B = -(2a + 1 – b) + (-b + 4)
C = (7 – a) + [-5 + 3a – (-1 + a) – 10]
Exercice 6
Calculez les sommes algébriques suivantes après les avoirs simplifiées :
A= 12 – (-4) + (-6) – 11 B= -6,8 – (–3,5 ) + (–3,1) + 7
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