Question

2/5 + 3/7 =

8/10 - 1/2 =

2/5 + 3/10 =

7/12 - 2/4 =

2/6 + 8/10 =​

Answer 1

Explicación paso a paso:

a)

$\frac{2}{5} +\frac{3}{7} =\frac{2*7+5*3}{5*7} =\frac{14+15}{35} =\frac{29}{35}$

b)

$\frac{8}{10} -\frac{1}{2} =\frac{4}{5} -\frac{1}{2} =\frac{4*2-5*1}{5*2} =\frac{8-5}{10} =\frac{3}{10}$

c)

$\frac{2}{5} +\frac{3}{10} =\frac{2*10+5*3}{5*10} =\frac{20+15}{10} =\frac{35}{50}=\frac{7}{10}$

d)

$\frac{7}{12} -\frac{2}{4} =\frac{7*4-12*2}{12*4} =\frac{28-24}{48} =\frac{4}{48}=\frac{1}{12}$

e)

$\frac{2}{6} +\frac{8}{10}=\frac{1}{3} +\frac{4}{5} =\frac{5*1+3*4}{3*5} =\frac{5+12}{15} =\frac{17}{15}$

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