I'll help with #1

Convert 6.35 to a mixed number.

A mixed number is a number in the form of a whole number and a fraction such as 1 3/4 which can also be written as 1.75.

To convert 6.35 we need to convert 0.35 to a fraction. .35 is the same as 35/100, now we need to simplify 35/100 to its simplist form. It is easy to see that 35 is divisible by 5 (7x5=35) and 100 is also divisible by 5 (20x5=100).

so we can convert 35/100 to 7/20 and our solution is now:

6 7/20, a mixed number.