Formula

Calculate the value

Answer

$\left( a+b \right) \div \left( -2 \right)$

$- \dfrac { a + b } { 2 }$

Arrange the rational expression

$\left ( \color{#FF6800}{ a } \color{#FF6800}{ + } \color{#FF6800}{ b } \right ) \color{#FF6800}{ \div } \left ( \color{#FF6800}{ - } \color{#FF6800}{ 2 } \right )$

$ $ Calculate the multiplication expression $ $

$\color{#FF6800}{ - } \color{#FF6800}{ \dfrac { a + b } { 2 } }$

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