Question

Determine o valor da expressão numérica: *

43/20

-43/20

23/40

-23/40

ME AJUDEM TENHO Q TERMIAR AS 08:00 POR FAVOR ​

Answer 1

Explicação passo-a-passo:

$\sf 1-\Big[-\dfrac{2}{5}-\Big(-\dfrac{1}{2}+\dfrac{3}{4}\Big)-0,5\Big]$

$\sf =1-\Big[-\dfrac{2}{5}-\Big(\dfrac{-2+3}{4}\Big)-0,5\Big]$

$\sf =1-\Big[-\dfrac{2}{5}-\dfrac{1}{4}-0,5\Big]$

$\sf =1-\Big[-\dfrac{2}{5}-\dfrac{1}{4}-\dfrac{1}{2}\Big]$

$\sf =1-\Big[\dfrac{-8-5-10}{20}\Big]$

$\sf =1-\Big[\dfrac{-23}{20}\Big]$

$\sf =1+\dfrac{23}{20}$

$\sf =\dfrac{20+23}{20}$

$\sf =\red{\dfrac{43}{20}}$

Resposta: 43/20