解:7/9×11/4-1/3=77/36-1/3=77/36-12/36=65/36=1又29/36
7/9×11/4-1/3=77/36-1/3=77/36-12/36=65/36=1又29/36
7/9×11/4一1/3=28/36一99/36一1/3=一71/36一12/36=一83/36