bonjour pourriez vous m'aider, mrc d'avance ​

Bonjour,

A+B

-3/27 +2/3

= -1/ 9 +2/3

= -1/9 +6/9

= 5/9

C-D

9/8 - 5/6

= 27/24 - 20/24

= 7/24

A*C

-3/27 * 9/8

= - 1/9 * 9/8

= -9/72

=  -1/ 8

B/D

= 2/3 * 6/5

= 12/15

= 4/5

(A-B/C +D) *15

=  (-3/27  - 2/3* 8/9 + 5/6) * 15

= (- 3/27  -16/27 + 5/6) *15

= (-19/27 +5/6)*15

= -285/27 + 75/6

= -95/9 +25/2

=  - 190/18 + 25/18

= -165/18

= - 55/6