递等式,一步一步来,不用简便运算（1）5/6÷5×1/5＋7/9×9/4（2）4/5÷7/9×9/8＋1/5（3）2/9－7/16×2/9（4）24÷7/6＋3/5

Question

递等式,一步一步来,不用简便运算
（1）5/6÷5×1/5＋7/9×9/4 （2）4/5÷7/9×9/8＋1/5 （3）2/9－7/16×2/9 （4）24÷7/6＋3/5

Answer 1

（1）5/6÷5×1/5＋7/9×9/4 （2）4/5÷7/9×9/8＋1/5
=5/6*1/5*1/5+7/9*9*4 =4/5*9/7*9/8+1/5
=1/30+7/4 =81/70+1/5
=2/60+105/60 =81/70+14/70
=107/60 =95/70=19/14
3）2/9－7/16×2/9 （4）24÷7/6＋3/5
=2/9-7/72 =24*6/7+3/5
=16/72-7/72 =144/7+3/5
=9/72=1/8 =720/35+21*35
=741/35