计算（能简算得要简算!）
37×36分之11
= 37×11/36
=(36+1)×11/36
=36×11/36+1×11/36
=11+11/36
（7分之3+8分之3）×56
=(3/7+3/8)×56
=(3/7)）×56+(3/8)）×56
=24+21
=45
把不对的算式改正过来~
7分之4×9分之5+7分之3×9分之4
=(4/7)*(5/9)+(3/7)*(4/9)
=20/63+12/63
=32/63
4分之1×5分之3÷4分之1×5分之3
=(1/4)(3/5)*4*(3/5)
=9/25