Question

能简便的用简便方法计算。（递等式哦）

额，上课没听，求各位大神教教我~非常急急急~~~（悬赏可以在加）题目：
（1）5/24（二十四分之五）÷7/8（2）17/121÷51/88（3）49/91÷13/14（4）5/7×2/3÷1/3（5）1/8×9/25+16/25÷8（6）7/72÷14/39×24/91（7）5/6÷（1/2+5/6）

Answer 1

5/24÷7/8
=5/24*8/7
=5/3*1/7
=5/21

17/121÷51/88
=17/121*88/51
=17/11*8/51
=1/11*8/3
=8/33

49/91÷13/14
=49/91*14/13
=686/1183

5/7×2/3÷1/3
=5/7*2/3*3
=5/7*2
=10/7

1/8×9/25+16/25÷8
=1/8*9/25+16/25*1/8
=1/8(9/25+16/25)
=1/8*25/25
=1/8

7/72÷14/39×24/91
7/72*39/14*24/91
=1/72*39/2*24/91
=1/72*39*12/91
=1/6*39*1/91
=1/2*13*1/91
=13/182

5/6÷（1/2+5/6）
=5/6÷(3/6+5/6)
=5/6÷8/6
=5/6*6/8
=5/8

Answer 2

（1）5/24（二十四分之五）÷7/8
=5/24*8/7
=5/21
（2）17/121÷51/88
=17/121*88/51
=8/33
（3）49/91÷13/14
=49/91*14/13
=49*14/(91*13)
=686/1183
（4）5/7×2/3÷1/3
=5/7*2/3*3
=10/7
（5）1/8×9/25+16/25÷8
=1/8*(9/25+16/25)
=1/8
（6）7/72÷14/39×24/91
=7/72*39/14*24/91
=3/(3*2*7)
=1/14
（7）5/6÷（1/2+5/6）

=5/6/(4/3)
=15/24
=5/8