数学六年级解题(附上公式!!!!!!)
1、91÷(1-25%-40%)
=91÷65%
=140(件)
2、1-20%-[(1-20%)x50 %]
=80%-40%
=40%
3、75%+1/2-1
=75%+50%-100%
=25%
4.上中百货大楼:(5-1)x60=240(人民币)
潘潘超市:5x60x80%=240元
买五个和买两个一样便宜!
=91÷65%
=140(件)
2、1-20%-[(1-20%)x50 %]
=80%-40%
=40%
3、75%+1/2-1
=75%+50%-100%
=25%
4.上中百货大楼:(5-1)x60=240(人民币)
潘潘超市:5x60x80%=240元
买五个和买两个一样便宜!