How many hundredths are in five tenths? how many thousandths are in five hundredths? explain

There are 0 hundredths in five thenths and there is five thousandsths in five hundredths.  
In addition to fraction notation, decimal notation is another way to write numbers between 0 and 1. Decimals can also be used to write numbers between any two whole numbers. For example, you may have to write a check for $2,003.38. Or, in measuring the length of a room, you may find that the length is between two whole numbers, such as 35.24 feet. In this topic you will focus on reading and writing decimal numbers, and rewriting them in fraction notation. To read or write numbers written in decimal notation, you need to know the place value of each digit, that is, the value of a digit based on its position within a number. With decimal numbers, the position of a numeral in relation to the decimal point determines its place value. For example, the place value of the 4 in 45.6 is in the tens place, while the place value of 6 in 45.6 is in the tenths place.