Sagot :
a=-6+4×(-9)
a=-6+(-36)
a=-6-36
a=-42
b=(-7-2)÷(5-8)
b=(-9)÷(-3)
b=3
d=3[7-(-1)×(4-9)]
d=3[7+1×(-5)]
d=3[7+(-5)]
d=3(2)
d=3×2
d=6
a=-6+4×(-9)
a=-6+(-36)
a=-6-36
a=-42
b=(-7-2)÷(5-8)
b=(-9)÷(-3)
b=3
d=3[7-(-1)×(4-9)]
d=3[7+1×(-5)]
d=3[7+(-5)]
d=3(2)
d=3×2
d=6