Calculer puis simplifier si possible les expressions suivantes: A=--7/4x11/9= B=15x14/35 C=6/7 / 9/5 D=15/8 / (-6)
Mathématiques
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Question
Calculer puis simplifier si possible les expressions suivantes:
A=--7/4x11/9=
B=15x14/35
C=6/7 / 9/5
D=15/8 / (-6)
A=--7/4x11/9=
B=15x14/35
C=6/7 / 9/5
D=15/8 / (-6)
2 Réponse
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1. Réponse MichaelS
[tex]A = \frac{-7}{4}\times \frac{11}{9}= \frac{-77}{36}\\\\ B = 15\times \frac{14}{35}= \frac{3210}{35} =6\\\\ C = \frac{6}{7}: \frac{9}{5}= \frac{6}{7}\times \frac{5}{9}= \frac{30}{63} = \frac{10}{21}\\\\ D = \frac{15}{8}:(-6)= \frac{15}{8}\times \frac{-1}{6} = \frac{-15}{48}=\frac{-5/16} [/tex] -
2. Réponse maudmarine
A = - 7/4 x 11/9
A = - 77/36
B = 15 x 14/35
B = 210/35
B = 35 x 6 / 35 x 1
B = 6/1
B = 6
C = 6/7 / 9/5
C = 6/7 x 5/9
C = 35/63
C = 7 x 5 / 7 x 9
C = 5/9
D = 15/8 / (- 6)
D = 15/8 x - 1/6
D = - 15/48
D = 3 x - 5 / 3 x 16
D = - 5/16