Sagot :
A = -15-3.2*(-8)+10.5/2.5
= -15+25.6+4.2
= 14.8
B = 19-12*(-4+4*2.1)
= 19-12*(-4+8.4)
= 19-12*4.4
= 19-52.8
= -33.8
A= 15-2.3*(-8)+10.5:2.5
A=15-(-18.4)+4.2
A=33.4+4.2
A=37.8
B=19-12*(-4+4*2.1)
B=19-12*(-4+8.4)
B=19-12*4.4
B=19-52.8
B=-33.8