ответ:1/2+3/5-2/3=11/10-2/3=13/30.
5/9+1/6+3/4=39/54+3/4=
=156/216+162/216=318/432=53/72
1/4+1/5-3/10=9/20-3/10=3/20.
ответ:1/2+3/5-2/3=11/10-2/3=13/30.
5/9+1/6+3/4=39/54+3/4=
=156/216+162/216=318/432=53/72
1/4+1/5-3/10=9/20-3/10=3/20.