Réponse :
Bonsoir
Explications étape par étape
Exercice 1
-2/9 -2/18 = -2/9 X 2/2 -2/18 = -4/18 -2/18 = -6/18 : 3/3 = -2/6 = -1/3
2/6 +15/18 = 2/6 X 3/3 +15/18 = 6/18 +15/18 = 21/18 : 3/3 = 7/6
Exercice 2
a = 2 --- b = -3 ---- c = -4
a - b = 2 --3 = 2 +3 = 5
c + b = -4 +-3 = -7
a + b -c = 2 + -3 - -4 = -1 +4 = +3
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Réponse :
Bonsoir
Explications étape par étape
Exercice 1
-2/9 -2/18 = -2/9 X 2/2 -2/18 = -4/18 -2/18 = -6/18 : 3/3 = -2/6 = -1/3
2/6 +15/18 = 2/6 X 3/3 +15/18 = 6/18 +15/18 = 21/18 : 3/3 = 7/6
Exercice 2
a = 2 --- b = -3 ---- c = -4
a - b = 2 --3 = 2 +3 = 5
c + b = -4 +-3 = -7
a + b -c = 2 + -3 - -4 = -1 +4 = +3