简便计算:1、5432.1×43.21-5432.2×43.20 2、4.74+(1.26-0.77) 3、3.85×6.6+38.5×0.33+0.3854、(4433-443.3)÷(8866-886.6)

问题描述:

简便计算:1、5432.1×43.21-5432.2×43.20 2、4.74+(1.26-0.77) 3、3.85×6.6+38.5×0.33+0.385
4、(4433-443.3)÷(8866-886.6)