Think about this: some tutors might experience a mental breakdown when they see that you have asked for help with 6 questions without sharing any of the work you've done yourself.
I will focus on one problem, the 5th:
How many m are equivalent to 357 cm? To work this out, you need to know that 1 cm = (1/100)m. You can make a conversion factor from this.
Then,
357 cm 1 m
----------- = ------------ = 3.57 m (answer)
1 100 cm
Please start over: choose another problem to work on, and post that only that one problem at one time.