Question

Tính: 

a) 200.0,8;

b) (-0,5).(-0,7);

c) (-0,8).0,006;

d) (-0,4).(-0,5).(-0,2).

Answer 1

`a,200.0,8`

`=20.8`

`=160`

`b)(-0,5).(-0,7)`

`=0,35`

`c)(-0,8).0,006`

`=-3/625`

`d)(-0,4).(-0,5).(-0,2)`

`=0,2.(-0,2)`

`=-0,04`

Answer 2

a) 200.0,8= 160

b) (-0,5).(-0,7)= 0.25

c) (-0,8).0,006=-3/625

d) (-0,4).(-0,5).(-0,2)=-0,04

Answer 3

\(a,\) \(200.0,8\)

\(=20.8\)

\(=160\)

\(b,\left(-0,5\right).\left(-0,7\right)\)

\(=\dfrac{-5}{10}.\dfrac{-7}{10}\)

\(=\dfrac{35}{100}=\dfrac{7}{20}\)

\(c,\left(-0,8\right).0,006\)

\(=\dfrac{-3}{625}\)

\(d,\left(-0,4\right).\left(-0,5\right).\left(-0,2\right)\)

\(=\dfrac{-4}{10}.\dfrac{-5}{10}.\dfrac{-2}{10}\)

\(=\dfrac{-40}{1000}\)\(=\dfrac{-1}{25}\)

Answer 4

a)200.0,8=160

b)(-0,5).(-0,7)=0.25

c)(-0,8).0,006=-3/625

d)(-0,4).(-0,5).(-0,2)=-0,04