Resposta:
2/5+1/10+7/10 = 1,2
Olá bom dia!
[tex]\frac{2}{5}+\frac{1}{10} +\frac{7}{10} \\\\= \frac{2.2+1.1+1.7}{10} \\\\= \frac{4+1+7}{10}\\\\=\frac{12}{10}\\\\= \frac{6}{5}[/tex]
