Вычислите: 3/5+1/5, 2/7+1/3, 3/4+5/12, 2/25+1/20; 3/7-2/7, 11/12-2/3, 2/3-5/9, 5/21-3/14

Question

Вычислите: 3/5+1/5, 2/7+1/3, 3/4+5/12, 2/25+1/20;
3/7-2/7, 11/12-2/3, 2/3-5/9, 5/21-3/14

Answer 1

0.8
13/21
1 1/6
0.13
1/7
0,25
1/9
1/42