(1+0.23+0.34)*(0.23+0.34+0.65)-(1+0.23+0.34+0.65)*(0.23+0.34))
问题描述:
(1+0.23+0.34)*(0.23+0.34+0.65)-(1+0.23+0.34+0.65)*(0.23+0.34))
答
(1+0.23+0.34)×(0.23+0.34+0.65)-(1+0.23+0.34+0.65)×(0.23+0.34)这道题目把(1+0.23+0.34)设为A,(0.23+0.34)设为B.那么原式变成:A×(B+0.65)-(A+0.65)×B=AB+0.65A-AB-0.65B=0.65A-0.65B...