(1+23+34)*(23+34+65)-(1+23+34+65)*(23+34)简便计算_数学解答

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

人气：480 ℃　时间：2020-04-18 11:53:51

解答

(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