0.32*78%+1.32*22% 脱式计算_数学解答

0.32*78%+1.32*22% 脱式计算

人气：206 ℃　时间：2020-05-21 15:32:11

解答

0.32×78%+1.32×22%
=0.32×78%+（1+0.32）×22%
=0.32×78%+1×22% +0.32×22%
=0.32×（78%+22% ）+0.22
=0.32+0.22
=0.54