Sagot :

Bonsoir,

A)

4/3 -5/2 = 8/6 - 15/6 =  - 7/6

- 2/3 +3/4 = - 8/12 + 9/12 = 1/12

-7/6 * 12/1 =  - 84/6 = -14

B)

4/3 -5/2*-3/2+3/4

= 4/3 + 15 /4 + 3/4

= 4/3 + 18/4

= 4/3 + 9/2

= 8/6 + 27/6

= 35/6