1+2*99-88/77=?
问题描述:
1+2*99-88/77=?
答
1+2*99-88/77=
=1+198-88/77
=197+154/77-88/77
=197+66/77
=197+6/7
答
197又七分之六
注:化简88/77=8/7
答
1+(2*99-88)/77
=1+2*99/77-88/77
=1+2*9/7-8/7
=1+18/7-8/7
=1+10/7
=17/7