Sagot :

Bonjour,

A=

-2(15/20 + 8/20) +3/2

= -2 *23/20 +3/2

= -46/20 +3/2

= -46/20 +30/20

-16/20 =0,80

arrondi: 1

troncature: 0

B=

4( 3/4 +2/4) -( 3/6 - 5/6)

=  4* 6/4 - (-2/6)

=  24/4 +2/6

= 12/2 +2/6

= 36/6 +2/6

= 38/6 = 6,3333333

Arrondi: 6,33

Troncature: 6