81/14+17*1/14=81/14+17/14=98/14=7
(27分之1-36分之1)÷9分之1 =(1/27-1/36)÷1/9=(4/108-3/108)*9=1/12
7/16*45-7/16*45=0
=(2/3-15/72)*16/7=(48/72-15/72)*16/7=33/72*16/7=22/21
81/14+17*1/14=81/14+17/14=98/14=7
(27分之1-36分之1)÷9分之1 =(1/27-1/36)÷1/9=(4/108-3/108)*9=1/12
7/16*45-7/16*45=0
=(2/3-15/72)*16/7=(48/72-15/72)*16/7=33/72*16/7=22/21