A, chickens and rabbits are in the same cage, with 1 5 head and 36 legs. How many chickens and rabbits are there? Fill in the following table according to the following conditions.

Head/head

Chicks/chicks

Rabbit/only

Legs/strips

15

eight

seven

15

five

15

four

15

three

1. Suppose there are 8 chickens, 7 rabbits and () legs.

2. The leg () is broken, which means that the rabbit () is broken, so the number of () should be reduced.

3. The number of rabbits has decreased by two, and the number of chickens is (). At this time, * * * has () legs.

4. The leg () is broken, and then () minus 1, so * * * has () legs.

5. Add () legs, and then reduce the number of rabbits 1, and get chicken () and rabbit (), * * * has 36 legs.

Please use the form to answer the following questions.

1, chickens and rabbits live in the same cage, with 20 heads and 44 legs. How many chickens and rabbits are there?

2. There are 1 yuan and 50-cent coins in the red piggy bank, worth 10.5 yuan. 1 yuan 50 cents How many coins are there?

Twenty-nine students went boating. They rented two kinds of boats, big and small, with 7 people per boat and 3 people per boat. How many boats can you rent per boat?

There are a group of ostriches and giraffes in the zoo. They have 30 eyes and 44 feet. How many ostriches and giraffes are there?

(Hint: How many heads are there in 30 eyes? )