Question

速度回答！一题5分！要详细的过程！

(8/5+6/5)×25/4 （6/5-3/2）×10/9 1-9/7÷8/7

Answer 1

你分数的分子分母写反了吧？
8/5，应该是5/8（8分之5吧）其他的也这样
1.
(5/8+5/6）×4/25
=5/8×4/25+5/6×4/25
=1/10+2/15
=3/30+4/30
=7/30

2.
（5/6-2/3）×9/10
=（5/6-4/6）×9/10
=1/6×9/10
=3/20

3.
1-7/9÷7/8
=1-7/9×8/7
=1-8/9
=1/9

Answer 2

35/2
-1/3
-1/8

Answer 3

(8/5+6/5)×25/4
=14/5*25/4
=35/3

（6/5-3/2）×10/9
=-3/10*10/9
=-1/3

1-9/7÷8/7
=1-9/8
=-1/8