Bonsoir,
A= 4,6 + 5,4 -1,9-0,1
= 8
B= 2*[ 5+ 2* ( 2,5 +3* 2)]
= 2*[ 5+2* 2,5 +6]
= 2* (5+ 5 +6)
= 2* 16
= 32
C= 56/ 7
= 8
D= (9)/ (12- 9/3)
= (9) / (12 -3)
= 9/ 9
= 1
E= 27-3* [ 4+ (21 -6) / (2+1)]
= 27 -3 *[ ( 4+( 15/ 3)]
= 27 -3* ( 4+5)
= 27 -3* 9
= 27 - 27
=0
