How is adding decimals similar to subtracting decimals?

Subtracting decimals uses the same setup as adding decimals: line up the decimal points, and then subtract. In cases where you are subtracting two decimals that extend to different place values, it often makes sense to add extra zeros to make the two numbers line up—this makes the subtraction a bit easier to follow.

Number nine is f(x)= 40x : ) hoped i ya