（7.25乘以40%+2.75乘以5分之2）除以20%怎么做_其他解答

（7.25乘以40%+2.75乘以5分之2）除以20%怎么做

人气：199 ℃　时间：2019-10-11 04:44:25

解答

[7.25*40%+2.75*(2/5)]/20%
=(7.25*40%+2.75*40%)/20%
=(7.25+2.75)*0.4*(100/20)
=4*5
=2 0