4又3/5+5/7+1又12/35

问题描述:

4又3/5+5/7+1又12/35

4又3/5+5/7+1又12/35
=4+3/5+5/7+1+12/35
=5+21/35+25/35+12/35
=5+58/35
=6又 23/35