Question

se a 0,6 + 15/10 e b + 8/5 - 3 qual o valor de B - A

monte a conta em forma de fração pfvr

Answer 1

Resposta:

$A=\dfrac{6}{10}+\dfrac{15}{10}\\ \\\\ \boxed{ A=\dfrac{21}{10}}$

$B=\dfrac{8}{5}-3\\ \\ B=\dfrac{8-15}{5}\\ \\ \\ \boxed{B=-\dfrac{7}{5}}$

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$B-A=- \dfrac{7}{5}-\dfrac{21}{10}\\ \\ \\ B-A=\dfrac{-14-21}{10}\\ \\ \\\boxed{ B-A=-\dfrac{35}{10}}\\ \\ \\\boxed{ B-A=-3,5}$