Question

What is the average of four tenths and five thousandths?

Answer 1

`((4)/(10)+(5)/(1000)):2 = ((400)/(1000)+(5)/(1000))*(1)/(2) =\\ \\=(405)/(1000)*(1)/(2)=(405)/(2000)=(81)/(400)= .2025`

Answer 2

four tenths is expressed as .4
five thousandths is expressed as .005
the sum of these is .405 and divided by 2 (there are two numbers we added), we get .2025, that is the average