Question

9/10-(1/5+1/2) what is the value of the expression?

Answer 1

`(9)/(10)-((1)/(5)+(1)/(2))`

start solving the sum of fractions that is inside the parentheses

`\begin{gathered} (9)/(10)-((1\cdot2+5\cdot1)/(5\cdot2)) \\ (9)/(10)-(2+5)/(10) \\ (9)/(10)-(7)/(10) \end{gathered}`

then, solve subtraction of fractions with a common denominator

`\begin{gathered} (9-7)/(10) \\ (2)/(10) \end{gathered}`

simplify

`(2)/(10)=(1)/(5)`