40%/(3+2/5)
=(2/5)/(17/5)
=(2/5)*(5/17)
=2/17
=17分之2
猜你喜欢
- 1i won't go to see the film tonight,because I ( ) my ticket . A lost B have lost 求各个选项详解
- 2已知向量OA,OB,OC且向量OC=λ向量OA+μ向量OB若已知λ+μ=1求证ABC三点共线
- 3如图,长方形纸片ABCD,沿折痕AE折叠边AD,使点D落在BC边上的点F处,已知AB=8,S△ABF=24,求EC的长.
- 4有两个多项式A=3A的平方-4A+1,B=2(A的平方-2A)+1,当A取任意有理数时,请比较A与B的大小
- 5【用分子原子的观点解释下列事实:1.水受热变成水蒸气2,水通电生成氢气和氧气】
- 6五年级举行跳绳比赛,五1班30人一分钟共跳1000下,五2班36人,平均每人每分钟跳30下,五3班34人,平均每人
- 7X-x²+6=0 x²+x-6=0 -x²-3x+10=0 x²+x+3=0
- 8it was a hard math.at half-time,one of the footballers___(take)to the hospit
- 9填特殊疑问词Would you please tell me _____is the way to the nearest station?为什么答案是which啊?
- 10测量不规则物体体积时,我们一般用什么来测量