a,2.8.5.25.125.4
=(8.125)(4.25)(2.5)
=1000.100.10=1000000
b,-25.3.9.(-4)
=[-25.(-4)](3.9)
=100.27=2700
a) ( 2.5) . ( 8.125 ) . ( 25.4 ) = 10 . 1000 . 100 = 1000000
b) [ -25.(-4) ] . 3 . 9 = ( 25 . 4 ) . 27 = 100 . 27 = 2700
a,2.8.5.25.125.4
=(2.5).(8.125).(25.4)
=10.1000.100
=1000000
b,(-25).3.9.(-4)
=[(-25).(-4)].(3.9)
=100.27
=2700
tao ko biết..............................................