There are infinitely many numbers in each system, however base 10 uses 10 digits {0, 1, 2, 3, 4, 5, 6, 7, 8, 9} and binary uses 2 digits {0, 1}.
The maximum digit is one less than the base.
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There are a few rules to perform arithmetic operations in binary numbers. According to those rules you can add or subtract binary numbers. There are only two arithmetic operations used in binary numbers, they are addition and subtraction.
This refers to numbers written in base-2, base-3, etc. The lowest number that can be used as a base for such an "base n" calculation is 2. The first few numbers in binary are as follows (left: base-10; right: base 2): 0 = 0 1 = 1 2 = 10 3 = 11 4 = 100 As you can see, starting from the number 2, in base-2 it is written differently.
32
38.21 ---> base 2 100110.00110101110000101000111101011100001010001 Used a conversion calculator at Math com.
Base ten numerals are the numbers 0 to 9 that are used every day. Base ten numerals were also used in Ancient Rome, but the numbers were actually letters like eight would be VIII. These numbers were called Roman Numerals.