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Mrs Hudson    0

Why does Primary Mathematics not include zero as a multiple for numbers?  For example the directions say list the first five multiples of 9 and the answer says 9,18,27,36.  

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Jenny    3

Possibly because it is a multiple of every number, but is not very useful in finding common multiples for later operations or problem solving. I suppose you could tell your student that 0 is a multiple of every number according to the formal definition of multiples, but it is not particularly useful to list it all the time when finding multiples to, for example, add fractions.

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