Question

Мне к общемуу знаменателю и сложите их : 1/4+1/3, 1/5+1/2, 1/3+ 1/7, 1/6+ 1/5

Answer 1

3/12+4/12=7/12
2/10+5/10=7/10
7/21+3/21=10/21
5/30+6/30=11/30

Answer 2

$\frac{1}{4}+\frac{1}{3}=\frac{3}{12}+\frac{4}{12}=\frac{7}{12}$
$\frac{1}{5}+\frac{1}{2}=\frac{2}{10}+\frac{5}{10}=\frac{7}{10}=0,7$
$\frac{1}{3}+\frac{1}{7}=\frac{7}{21}+\frac{3}{21}=\frac{10}{21}$
$\frac{1}{6}+\frac{1}{5}=\frac{5}{30}+\frac{6}{30}=\frac{11}{30}$