calculer et simplifiez A= -1/2 x 5/-7 x 14/15= B= 5 x (-6/5+1/10= C= 5/3 - 4/7 ÷ 5/14 =
Mathématiques
pheibi1
Question
calculer et simplifiez
A= -1/2 x 5/-7 x 14/15=
B= 5 x (-6/5+1/10=
C= 5/3 - 4/7 ÷ 5/14 =
A= -1/2 x 5/-7 x 14/15=
B= 5 x (-6/5+1/10=
C= 5/3 - 4/7 ÷ 5/14 =
2 Réponse
-
1. Réponse maudmarine
A = - 1/2 x 5/-7 x 14/15
A = 5/14 x 14/15
A = 70/210
A = 70 x 1 / 70 x 3
A = 1/3
B = 5 x (-6/5 + 1/10)
B = 5 x (- 6 x 2 / 5 x 2 + 1/10)
B = 5 x (- 12/10 + 1/10)
B = 5 x - 1/10
B = - 5/10
B = 5 x - 1 / 5 x 2
B = - 1/2
C = 5/3 - 4/7 ÷ 5/14
C = 5/3 - 4/7 x 14/5
C = 5/3 - 56/35
C = 5 x 35 / 3 x 35 - 56 x 3 / 35 x 3
C = 175/105 - 168/105
C = - 7/105
C = 7 x -1 / 7 x 15
C = - 1/15 -
2. Réponse rosa1
A=1/2X5/-7X14/15=1X5X14/2X(-7X15
=1X5X2X7/1X2X7X(-1X3X5=1/-3
A=-1/3