aider moi svp 10 point pour 2 calcule a=(1/2-3/4)x16/9 b=1/2-3/4x16/9 ce si est de fraction
Mathématiques
mini123
Question
aider moi svp 10 point pour 2 calcule
a=(1/2-3/4)x16/9
b=1/2-3/4x16/9
ce si est de fraction
a=(1/2-3/4)x16/9
b=1/2-3/4x16/9
ce si est de fraction
2 Réponse
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1. Réponse maudmarine
a = (1/2 - 3/4) x 16/9
a = (1 x 2 / 2 x 2 - 3/4) x 16/9
a = (2/4 - 3/4) x 16/9
a = - 1/4 x 16/9
a = - 16/36
a = 4 x - 4 / 4 x 9
a = - 4/9
b = 1/2 - 3/4 x 16/9
b = 1/2 - 48/36
b = 1 x 18 / 2 x 18 - 48/36
b = 18/36 - 48/36
b = - 30/36
b = 6 x - 5 / 6 x 6
b = - 5/6 -
2. Réponse jujitsuzakaria
a=(1/2-3/4)x16/9
=(2/4-3/4)×16/9
=-1/4×16/9
=-1/4×(4×4/9)=-1×4/9=-4/9
b=1/2-3/4×16/9
=1/2-(3/4×(4×4/9))
=1/2-(3×4/9)
=1/2-12/9
=9/18-24/18=-15/18=-5×3/6×3=-5/6