A school has 1200 students. If no one saves in 0.2 yuan every day, how much can all students save in a week? How many exercise books can 0.5 yuan buy? If these exercise books are used to help students in poor areas, a student needs eight such exercise books. How many students can they help?

0.2x 1200=240

240/0.5=480

480/8=60

A warehouse is 7 meters long, 5 meters wide and 2 meters high. How many cubic meters can it hold? If this warehouse is used to store packaged TV sets, how many TV sets can it store? What else do you know? Please list the collected information and calculate it. (There is something wrong with the title)

7x5x2=70

The surface area of the earth is about 5 1 100 million square kilometers, of which the ocean area accounts for about 70.8% of the total surface area of the earth. How many square kilometers is the area of the ocean?

5. 1x70.8%=3.6 108

It costs about 50,000 yuan to help a poor college student realize his college dream. If 65.438+300 million people donate one yuan each, how many college students can this 65.438+300 million yuan help?

1.3 billion = 1.3 trillion

130000/5=26000

Breakfast table in Dong Li: 200g steamed bread, 50g eggs and 50g milk100g.

What is the breakfast distribution ratio in Dong Li?

Dong Li's father ate about 490 grams of breakfast at the same rate. How many grams did his father eat for breakfast today?

200:50: 100=4: 1:2

4+ 1+2=7

490/7=70

4x70=280

1x70=70

2x70= 140