Verified answer

Réponse :

Bonsoir

Explications étape par étape

A = 2 + 3/5 : 7/4

A = 2 + 3/5 * 4/7

A = 2 + 12/35

A = 70/35 + 12/35

A = 82/35

B = -7/9 - 8/11 : 9

B = -7/9 - 8/11 * 1/9

B = -7/9 - 8/99

B = -77/99 - 8/99

B = -85/99

C = 2/3 - 5/3 : 20/21

C = 2/3 - 5/3 * 21/20

C = 2/3 - (5*7*3)/(3*5*4)

C = 2/3 - 7/4

C = 8/12 - 21/12

C = -13/12

D = 7/9 : (1/3 - 2)

D = 7/9 : ( 1/3 - 6/3)

D = 7/9 : (-5)/3

D = 7/9 * (-3)/5

D = -21/45

D = (-3 * 7)/(3 * 15)

D = -7/15

Verified answer

Explications étape par étape

Exercice 27

A = 2 + 3/5 : 7/4

A = 2 + 3/5 x 4/7

A = 2 + 12/35

A = 70/35 + 12/35

A = 82/35

B = - 7/9 - 8/11 : 9

B = - 7/9 - 8/11 x 1/9

B = - 7/9 - 8/99

B = - 77/99 - 8/99

B = - 85/99

C = 2/3 - 5/3 : 20/21

C = 2/3 - 5/3 x 21/20

C = 2/3 - 105/60

C = 40/60 - 105/60

C = - 65/60 = - 13/12

D = 7/9 : ( 1/3 - 2 )

D = 7/9 : ( 1/3 - 6/3 )

D = 7/9 : ( - 5/3 )

D = 7/9 x ( - 3/5 )

D = - 21/45 = - 7/15