简便计算:23.5乘5.66减23.4乘5.67 1.2/(1.2/2.3)/(2.3/3.4)/(3.4/4.5)谢谢啦!快快快_数学解答

简便计算:23.5乘5.66减23.4乘5.67 1.2/(1.2/2.3)/(2.3/3.4)/(3.4/4.5)
谢谢啦!快快快快快快快快快快快!

人气：391 ℃　时间：2019-08-18 20:40:27

解答

23.5×5.66-23.4×5.67
=(23.4+0.1)×5.66-23.4×5.67
=23.4×5.66+0.1×5.66-23.4×5.67
=0.1×5.66-23.4×(5.67-5.66)
=0.566-23.4×0.01
=0.566-0.234
=0.332
1.2/(1.2/2.3)/(2.3/3.4)/(3.4/4.5)
=1.2×(2.3/1.2)×(3.4/2.3)×(4.5/3.4)
=4.5