bài 8:
a, (4.25).(-8.-125).(-50)
=100.1000.-50
=-5000000
b=(-4.25).(-20.5).(-100)
=-100.-100.-100
=-1000000
c, =123.(25-25)
=123.0
=0
d, -24.(1135-135)
=-24.1000
=-24000
bài 9
a, =-41.(74+26)
=-41.100
=-4100
b, =-54.(38+12-50)
=-54.0=0