1. This credit cooperative handled the following savings business from 9: 00 to 9: 30 a.m. on a certain day: withdraw 350.50 yuan, deposit it in 800 yuan, withdraw it from 50 yuan, withdraw 105.50 yuan, deposit it in 220 yuan, withdraw it from 430 yuan and deposit it in 650 yuan. How much has the cash of the credit union increased at this time?

2. The growth of organisms mainly depends on the increase of the number of cells in organisms. The increase in the number of cells is through cell division, and one cell divides into two cells. 1 How many cells does the cell divide into after 10 times?

3. There is a rope with a length of 10 meter. Cut off half at 1 time, and cut off the remaining half for the second time ... How long is the rope left after 7 cuts?

4. The deepest part of the ocean is the Mariana Trench in the Pacific Ocean, with an altitude of-11034m. Mount Everest is 8848 meters above sea level. How many meters higher than Mariana Trench?

5. The elevation of Turpan Basin is-155m, the elevation of Mariana Trench is-1 1034m, and the elevation of Mount Everest is 8848m. How many meters is Turpan Basin higher than Mariana Trench? How many meters lower than Mount Everest?

6. In the three games, the time middle school football team won 5: 3 in the first game, lost 2: 6 in the second game and tied 2: 2 in the third game. How many goal difference did the middle school football team have in these three games?

7. A snail climbs a tree, climbing 1.5m during the day and 0.3m at night. How many meters did a * * * climb day and night?

That's all I have. Please choose me! ! !