Question

quanto é [2,5+4x(2-1,5)-1/4+8] ?
(o x e vezes)
porfavor respondam

Answer 1

$2,5+4\times (2-1,5)-\dfrac{1}{4}+8\\\\\\ =2,5+4\times (0,5)-\dfrac{1}{4}+8\\\\\\ =2,5+2-\dfrac{1}{4}+8\\\\\\ =2,5+2-0,25+8\\\\ =4,5-0,25+8\\\\ =4,25+8\\\\ =\boxed{\begin{array}{c}12,25 \end{array}}$


Bons estudos! :-)