(1+23+34)(23+34+65)-(1+23+34+65)(23+34)简便计算

分类: 作业答案 • 2021-12-19 20:56:44

问题描述：

(1+23+34)*(23+34+65)-(1+23+34+65)*(23+34)简便计算

答

(1+23+34)*(23+34+65)-(1+23+34+65)*(23+34)
=(23+34+65)+(23+34)*(23+34+65)-(23+34)-(23+34)*(23+34+65)
=23+34+65-(23+34)
=23+34+65-23-34
=65

(1+23+34)*(23+34+65)-(1+23+34+65)*(23+34)简便计算