1954
The defining property of the decimal number system is that the place value of each digit is ten times the place value of the digit to its right.
All countries use the numerical notation in which the place value of any digit is ten times the place value of the digit to its right. That is the decimal system for numbers.
9 in the decimal system
Almost exactly like the decimal system, but the base is the number 2, instead of the number 10. This refers to the place-value system: in decimal, each digit has a place-value that is 10 times as much as the digit on the right; in binary, the factor is 2. It is helpful if you understand the place-value system in decimal first.
a decimal
It is based on ten digits and the concept of place value.
The place value of each digit is b times the place value of the digit to its right where b is the base for the system: whether that is binary, octal, decimal, duodecimal, hexadecimal, sexagesimal or some other value.
decimal
The whole number is 5 and .267 is the decimal place value to three decimal places
the place value after a decimal point is tenths
The largest place value is the tenths place. The smallest is, well, infinite.