计算递等式,能简算的要简算
5/7+75%+4/7x2/3
650÷13/5-150x5/3
24x(四又六分之一x75%-2/3)
2/5x62.5%+20%÷4/15
[5/6＋2/33(17/5-7/4)]÷13/3
(75%+2/5)÷(1-30%)
1/7÷3/14-1/3x2/5+2/9
76÷4+23x1/4+1/4