Answered

salut , pouvez m'aider svp :
Effectuer les calculs suivants
a=-2+(-8)x(-5)
b=3x(-4)+(-5)
c=-5x2.6+(12-4)x3
d=-4x(-6.3+2.3)-(-5.2)

Sagot :

a = -2 + (-8 )x (-5)
= -2 + 40
= 38

b =3 x (-4) + (-5) 
= -12 + (-5)
= -17

c = -5 x 2.6 + (12 - 4 )x 3
= -13 + 8 x 3
= -13 + 24
= 11

d =- 4 x (-6.3 + 2.3) - (-5.2)
= -4 x (-4) + 5,2
= 16 + 5,2
= 21,2