Place value, where the value of a digit depends on the position it occupies is fundamental to naming
numbers no matter how large or small. Particular difficulties arise when the digit 0 is used in one or more
places and when numbers involve a teen number where the reading of the number conflicts with the
order in which the digits are written, for example with 620 040 or 287 315 201. When larger quantities
are required, exponential notation is often used so that a number such as 456 700 000 is written as
4.567 x 10
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