Вычислите: 1\2+1\3;1\3-1\4;1\4+1\5;1\5-1\6

Question

Вычислите: 1\2+1\3;1\3-1\4;1\4+1\5;1\5-1\6

Answer 1

1/2+1/3=3/6+2/6=5/6
1/3-1/4=4/12-3/12=1/12
1/4+1/5=5/20+4/20=9/20
1/5-1/6=6/30-5/30=1/30