计算,能简算的要简算.2/3+3/5+5/6 10-4/13-9/13 6/7-3/8+1/8 3.92/{1.75*(5.19-3.59)}

问题描述:

计算,能简算的要简算.2/3+3/5+5/6 10-4/13-9/13 6/7-3/8+1/8 3.92/{1.75*(5.19-3.59)}

2/3+3/5+5/6 =40/60+36/60+50/60=126/60=2又1/1010-4/13-9/13 =10-(4/13+9/13)=10-1=96/7-3/8+1/8 =9/7-(3/8-1/8)\=9/7-1/4=36/28-7/28=1又1/283.92/{1.75*(5.19-3.59)}=3.92/(1.75*1.6)=3.92/2.8=1又2/5