Question

tính nhanh 

\(\frac{120-\left(-0,5\right).\left(-40\right).\left(-5\right).\left(-0,2\right).20.0,25}{5+10+10+1995}\)

Answer 1

Trả lời

120-(-0,5).(-40).(-5).(-0,2).20.0,25/5+10+10+1995

=120-[(-0,5).(0,2)].[(-40).0,25].[20.(-5)]/2020

=120-0,1.(-10).-100/2020

=120-101/2020

=120-101/2020

=19/2020

Answer 2

\(=\frac{-120+\frac{1}{2}.\left(-40\right).\left(-5\right).\frac{-1}{5}.20.\frac{1}{4}}{5+20.1+1995}\)

\(=\frac{-120+1.\left(-1\right).-5.1.5}{5+1995}\)

\(=\frac{120.-1.1.-5.1.5}{2000}\)

\(=\frac{-120.1\left(-5+5\right)}{2000}\)

\(=0\)