Question

ayúdenme xfavor es adición ​

Answer 1

Respuesta:

2/5+3/4=8+15/20=23/20

2/5+2/7=14+10/35=24/35

1/5+3/4=4+15/20=19/20

1/5+2/7=7+10/35=17/35

Explicación paso a paso:

Answer 2

Respuesta:

Explicación paso a paso:

$\begin{matrix}+&\frac{3}{4}&\frac{2}{7}\\\\\frac{2}{5}&\boxed{\frac{2}{5}+\frac{3}{4}}=\frac{8+15}{20}=\boxed{\frac{23}{20}}&\boxed{\frac{2}{5}+\frac{2}{7}}=\frac{14+10}{35}=\boxed{\frac{24}{35}}\\\\\frac{1}{5}&\boxed{\frac{1}{5}+\frac{3}{4}}=\frac{4+15}{20}=\boxed{\frac{19}{20}}&\boxed{\frac{1}{5}+\frac{2}{7}}=\frac{7+10}{35}=\boxed{\frac{17}{35}}\end{matrix}$