Question

2) resolva os racionais;

a) (5/6 x 7/10) x 0,3 =

b) 15 : √25 - √36 + 4 :( √16) − 1 =

Answer 1

Resposta:

Olá bom dia!

Lembre que 0,3 = $\frac{3}{10}$

$a) \\\\(\frac{5}{6} .\frac{7}{10}) .\frac{3}{10} \\\\\frac{35}{60} .\frac{3}{10} = \frac{7}{20} .\frac{1}{2} = \frac{7}{40}$

$b)\\\\15:\sqrt{25} -\sqrt{36} +4:\sqrt{16} - 1\\\\3:5 -6 + 4:4-1\\\\\frac{3}{5} -6+1-1\\\\\frac{3 - 30}{5} + 0\\\\-\frac{27}{5}$