Réponse :
bonjour
Explications étape par étape
2/3x7/9-1/3
2/3x7/9=14/27
14/27-1/3=14/27-(1x9)/(3x9)=14/27-9/27=5/27
b)12x(5/8-1/4)
5/8-1/4=5/8-(1x2)/(4x2)=5/8-2/8=3/8
12x3/8=36/8=9/2
c)13/15-4/15x3/4
4/15x3/4=12/60=(1x12)/(12x5)=1/5
13/15-1/5=13/15-(1x3)/(5x3)=13/15-3/15=10/15=2/3
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Réponse :
bonjour
Explications étape par étape
2/3x7/9-1/3
2/3x7/9=14/27
14/27-1/3=14/27-(1x9)/(3x9)=14/27-9/27=5/27
b)12x(5/8-1/4)
5/8-1/4=5/8-(1x2)/(4x2)=5/8-2/8=3/8
12x3/8=36/8=9/2
c)13/15-4/15x3/4
4/15x3/4=12/60=(1x12)/(12x5)=1/5
13/15-1/5=13/15-(1x3)/(5x3)=13/15-3/15=10/15=2/3