For a certain beverage, the price is 10 yuan for a large bottle of 1200ml and 2 yuan for a small bottle of 200ml. For promotion, store a buys a large bottle For promotion, store a: buy a large bottle and get a small one free; store B: 10% off for both large and small bottles. If you want to drink 2000 ml of this beverage, how can you spend the least? (explain by calculation)

For a certain beverage, the price is 10 yuan for a large bottle of 1200ml and 2 yuan for a small bottle of 200ml. For promotion, store a buys a large bottle For promotion, store a: buy a large bottle and get a small one free; store B: 10% off for both large and small bottles. If you want to drink 2000 ml of this beverage, how can you spend the least? (explain by calculation)

Go to store a to buy a large bottle and get a small one free. Spend 10 yuan to buy 1200 + 200 = 1400ml
2000-1400 = 600 ml
Go to store a and spend 2x3x0.9 = 5.4 yuan to buy 3 small bottles of 600 ml
A total of 10 + 5.4 = 15.4 yuan, the least money

In order to promote sales, four stores launched a preferential strategy, and held a party in class 6 (1), To prepare 45 small bottles of this beverage (no separate packaging), go to () store to buy the cheapest. 1. Buy two big bottles to get a small bottle free. 2. 10% discount for all. 3. You can enjoy a 20% discount for all purchases over 50 yuan. 4. You can reduce 15 yuan for every purchase over 50 yuan

Three, of course
Do not buy a large bottle directly row 1;
20% off for 81 yuan;
3. 20% off for 50% shopping, 90 * 0.8 = 72;
When 4 is 50 minus 15, 90-15 = 75;
finish

For a certain beverage, the big bottle costs 10 yuan and the small bottle costs 2 yuan. The three stores of a, B and C promote sales in different ways,
Store B: 10% off for all. Store C: 20% off for over 30 yuan. According to the discount offered by the mall, can you help five customers choose the right mall to buy these foods?
Customer Lin Zhao Zhou Wang Zhang
Purchase plan 2 big 2 small 1 big 8 small 4 big 1 big 5 small 3 big 3 small

Lin goes to Jia's. 20 yuan
Zhao quyi store. 23.4 yuan
Zhou goes to C store. 25.6 yuan
Wang to a and B are the same. 18 yuan
Zhang goes to C store. 28.8 yuan

The price of a large bottle (1200ml) is 10 yuan, and that of a small bottle (200ml) is 2 yuan
Shop a: buy a large bottle and get a small one free. Shop B will give 10% discount. Buy 3000ml drinks to entertain guests. Where is the best place to buy?

It's a good deal to buy a, of course~~
A: 1200 + 1200 (free 200 + 200) + 200 = 3000 liters, that is: 10 + 10 (free 2 + 2) + 2 = 22 yuan
B: 1200 + 1200 + 3 * 200 = 3000 liters, that is: 10 * 0.9 + 10 * 0.9 + 3 * 2 * 0.9 = 9 + 9 + 5.4 = 23.4