请问那1-14/1-7/2?4/3+12/1+12/7+4/3?8/5-(3/1+0.25)是?
问题描述:
请问那1-14/1-7/2?4/3+12/1+12/7+4/3?8/5-(3/1+0.25)是?
答
1-14/1-7/2
=1-(14/1+7/2)
=1-14/5
=14/9
4/3+12/1+12/7+4/3
=(4/3+4/3)+(12/1+12/7)
=2/3+3/2
=6/13
8/5-(3/1+0.25)
=8/5-4/1-3/1
=8/3-3/1
=24/1