3/4-3/4÷3+1/5等于多少?还有（8/7-4/5）*7/8等于多少?

3/4-3/4÷3+1/5 （8/7-4/5）*7/8
=3/4-1/4+1/5 = 1-7/10
=2/4+1/5 =3/10
=7/10
如果错了告诉我哈

3/4-3/4÷3+3/5
=3/4-3/4×1/3+3/5
=3/4-1/4+3/5
=1/2+3/5
=5/10+6/10
=11/10
（8/7-4/5）×7/8
=8/7×7/8-4/5×7/8
=1-7/10
=3/10本回答被网友采纳