1/30-(-2/3+3/5)÷(-2)-(2/13-1/3-1/6)×7865%(y-1)=37%(y+1)-0.82
问题描述:
1/30-(-2/3+3/5)÷(-2)
-(2/13-1/3-1/6)×78
65%(y-1)=37%(y+1)-0.82
答
1/30-(-2/3+3/5)÷(-2)
=1/30-(-1/15)*(-1/2)
=1/30-1/30
=0
答
1、原式
=1/30-(-10/15+9/15)×(-1/2)
=1/30-(-1/15)×(-1/2)
=1/30-1/30
=0
2、原式
=-(2/13×78-1/3×78-1/6×78)
=-(2×6-26-13)
=-(12-26-13)
=-(-27)
=27
3、0.65y-0.65=0.37y+0.37-0.82
0.65y-0.37y=0.65+0.37-0.82
0.28y=0.2
y=0.2/0.28
y=5/7
答
1/30-(-2/3+3/5)÷(-2)=1/30-(-1/15)*(-1/2)=1/30-1/30=0-(2/13-1/3-1/6)×78=-(2/13×78-1/3×78-1/6×78)=-(12-26-13)=2765%(y-1)=37%(y+1)-0.820.65y-0.65=0.37y+0.37-0.820.65y-0.37y=0.65+0.37-0....