Question

Simplify this expression 20.25 - 9 1/2 +11 A. -1/4 b. 18.75 C 21 3/4 D. 40.75

Answer 1

The expression we need to simplify is

`20.25-9(1)/(2)+11`

First, let us convert the mixed number to a fraction:

`\begin{gathered} 9(1)/(2)=9+(1)/(2) \\ \end{gathered}`
`\rightarrow9\cdot(2)/(2)+(1)/(2)`
`(19)/(2)`

Now our expression has become

`20.25-(19)/(2)+11`

Adding 20.25 and 11 gives

`31.25-(19)/(2)`
`\rightarrow31.25\cdot(2)/(2)-(19)/(2)`
`\rightarrow(62.5)/(2)-(19)/(2)`
`\rightarrow(43.5)/(2)`
`\rightarrow21.75.`