17×11/20-1/20×17=17×(11/20-1/20)=17×1/2=8.5你好,本题已解答如满意,请点采纳
17×11/20-1/20×17=17×(11/20-1/20)=17×1/2=17/2
17×11/20-1/20×17=17/20×(11-1)=17/20×10=17/2
17×(11/20-1/20)=17×1/2=17/2
原式=17/20*(11–1)=17/20*10=17/2