A big poke of mineral water should be taken as a small bottle of mineral water Small mineral water 1500ml, large mineral water 18L

A big poke of mineral water should be taken as a small bottle of mineral water Small mineral water 1500ml, large mineral water 18L

A big poke of mineral water is better than (12) such a small bottle of mineral water
18L÷1500ml=12

Shop a: buy one free {buy one big bottle get one small bottle free}; shop B: 10% off. Where should Mr. Sun buy three big bottles and five small bottles of mineral water
It's more cost-effective to buy? {big bottle net content 3 liters 10 yuan a bottle, small bottle net content 200 ml 2 yuan a bottle}

1. Buy one get one free
It costs 30 yuan to buy 3 large bottles and 3 small bottles free, and it costs 34 yuan to buy 2 small bottles 2 × 2 = 4 yuan
2. All are sold at a 10% discount
（10×3+2×5）×0.9
=40×0.9
=36 yuan
So it's a good deal to go to store a

One large bottle of shampoo is packed in five small bottles on average. What is the proportion of shampoo in each small bottle? How many liters per vial?

1 △ 5 = 152 △ 5 = 25 (L) a: 15% of the shampoo in each vial, 25 L in each vial