计算下面各题,能简算的简算
问题描述:
计算下面各题,能简算的简算
(7/5+49)*1/49 45*16/9+20/9/1/45
15.6-2又2/7-4又5/7 7/12+(3/4-1/3)/1/36
答
(7/5+49)*1/49 =7/5*1/49+49*1/49 =1/35+1=1又1/3545*16/9+20/9/1/45=45*16/9+20/9*45=45*(16/9+20/9)=45*4=18015.6-2又2/7-4又5/7 =15.6-(2又2/7+4又5/7)=15.6-7=8.6 7/12+(3/4-1/3)/1/36=7/12+(3/4-1/3)*36=...