There are infinitely many numbers. Three examples are:
3.0000000000000012300045973
3.00000000000000123000459746009
4.999999999999999999999999
2.1,2.2,2.3
Three hundredths.
There is no whole number between 2 and 3. But decimals like 2.1, 2.2, 2.3 etc can be considered numbers between 2 and 3
Three hundredths in decimals is represented as 0.03.
3/4 = 0.75
The halfway number between 3/4 and 3/5 is 27/40.
There's an infinite number of decimals between 3 and 4, 3.5 is between them, though.
50 and 1/8 50 and 3/20 50 and 7/40
After 2.9, the next whole number is 3. Decimals are a way to represent parts of a whole number, so when counting in decimals, the next number after 2.9 is the next whole number, which is 3.
Not "number", but "numbers" - there are infinitely many. For a start, get a decimal approximation (on your calculator) for the square root of 2 and 3, then get some terminating decimals that are between those.
2/3 = 0.667
3 is a number and plus 3 is adding three to a number