(33/2+1/5)+(2/3-12/17)-(1/5+5/17) (简便计算)
问题描述:
(33/2+1/5)+(2/3-12/17)-(1/5+5/17) (简便计算)
答
(33/2+1/5)+(3/2-12/17)-(1/5+5/17)
=33/2+1/5+3/2-12/17-1/5-5/17
=(33/2+3/2)-(12/17+5/17)
=18-1
=17(2/3+1/5)+(2/3-12/17)-(1/5+5/17) (简便计算)对不起,我发错了(2/3+1/5)+(2/3-12/17)-(1/5+5/17)=2/3+1/5+2/3-12/17-1/5-5/17=(2/3+2/3)-(12/17+5/17)=4/3-1=1/3