Question

Which of the following expressions results in -4? O -20 .0.2 O -6. 1.5 04. (-1)

Answer 1

We have 4 expressions.

We have to find which ones give -4 as a result.

`-20\cdot0.2=-20\cdot(2)/(10)=(-20)/(10)\cdot2=-2\cdot2=-4`
`-6\cdot1.5=-6\cdot(3)/(2)=-(6\cdot3)/(2)=(-18)/(2)=-9`
`-(2)/(4)\cdot(8)/(2)=-(8)/(4)=-2`
`4\cdot(-1+(1)/(4))=4\cdot((-1\cdot4+1)/(4))=-4+1=-3`