11-7/10-3/10=11-(7/10+3/10)=11-1=107/12-(大并3/4-1/2)=7/12-9/12+6/12=4/12=1/31/2-(3/4-3/8)=1/2-3/4+3/滚迟迹8=4/8-6/8+3/旦渣8=1/8