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Sagot :

VINS

bonjour,

B  = 2 +  ( 2/7 : 5/14)

= 2 + ( 2 /7 x 14/5)

= 2  + 28/35

 =  70/35 + 28/35

 = 98/35

= 14 / 5

C  =  - 3/14 -  ( 3 : 7/5) + 2

= - 3/14  - ( 3 x 5/7) + 2

= - 3/14  - 15/7 + 2

=  - 3/14 - 30/14 + 28/14

=  - 5/14

D =  7/5 + ( 8/15 : 2/3) - 19/2

=  7/5 + ( 8/15 x 3/2) - 19/2

= 7/5 + 24/30 - 19/2

=  42/30 + 24/30 - 285/30

=  219/30

=  73/ 10

TELEPHONE16

Réponse :

Bonjour

Explications étape par étape

B = 2 +(2/7 : 5/14) =

B = 2 + ( 2/7 X 14/5)

B = 2 + 28/35

B = 2  X 35/35 +28/35

B = 70/35 +28/35

B = 98/35 = 14/5

C = -3/14 (-3: 7/5) +2

C = -3/14 - (3  X 5/7) +2

C = -3/14 - 15/7 +2

C = -3/14 -30/14 +28/14

C = -33/14 +28/14 + -5/14

D = 7/5 + (+8/15 : 2/3)  -19/2

D = 7/5 + (8/15  3/2) -19/2

D = 7/5 +24/30 -19/2

D = 7/5 X  6/6 +24/30 -285/30

D = 42/30 + 24/30 -285/30

D = 219/30 = 73/10

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