11/5x(1/3-1/2)x3/11÷5/4 =(11/5)×(-1/6)×(3/11)×(4/5) =(-1/10)×(4/5) =-2/25; 很高兴为您解答,skyhunter002为您答疑解惑 如果本题有什么不明白可以追问,
