A kind of milk, each bottle price is a yuan, supermarket in order to promote sales, buy two get one free, now each bottle of milk together () yuan?

A kind of milk, each bottle price is a yuan, supermarket in order to promote sales, buy two get one free, now each bottle of milk together () yuan?

(a + a) △ 3 yuan

Li Lin goes to buy milk. It's 1.6 yuan for a bag of milk. He has 9.6 yuan. How many bags can he buy?

Divide 9.6 by 1.6 to buy 6 bags
If you buy two bags and get one free, you will get three free
I can buy 9 bags

A case of Yili milk 8 bags, a total of 24.80 yuan, how much is the unit price of a bag of milk? Now the supermarket is engaged in promotion, buy a box to send two bags, century generation how much? Cheaper than the original

24.8/8=3.1
24.8/10=2.48
3.1-2.48=0.62