On donne A = (1/3 - 2/5 x 15/8 + 7/12 ) 1/5 -7/12 − . Ecrire A sous forme de fraction irréductible. SVPPP
Mathématiques
lilia2131
Question
On donne A =
(1/3 - 2/5 x 15/8 + 7/12 ) 1/5 -7/12
−
. Ecrire A sous forme de fraction irréductible.
SVPPP
(1/3 - 2/5 x 15/8 + 7/12 ) 1/5 -7/12
−
. Ecrire A sous forme de fraction irréductible.
SVPPP
1 Réponse
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1. Réponse aminerbt
A = (1/3 - (2/5 x 15/8) + 7/12 ) / (1/5 - 7/12)
A = (1/3 - (2/1 x 3/8) + 7/12 ) / (12/60 - 35/12)
A = (1/3 - (1/1 x 3/4) + 7/12 ) / ((12- 35)/12)
A = (1/3 - (1 x 3/4) + 7/12 ) / (23/12)
A = (1/3 - 3/4 + 7/12 ) / (23/12)
A = (4/12 - 9/12 + 7/12 ) / (23/12)
A = ((4 - 9 + 7)/12 ) / (23/12)
A = ((11 - 9)/12 ) / (23/12)
A = ( 2/12 ) / (23/12)
A = 2/23