We use a decimal point to separate units (ones) from parts of a whole, such as tenths, hundredths, thousandths, etc. \({0.1}\) is a tenth, \(\frac{1}{10}\), of a one ...

Speaker: Where a digit sits within a number tells you its value. Its place value. If it's a unit, a ten or a hundred, the position gives the digit a different value. This flat is for sale for £147,999 ...