Thinking of solving problems: to judge the ratio between two related quantities depends on whether the corresponding ratio of these two quantities is certain or the corresponding product is certain; If the proportion is certain, it is proportional; If the product is constant, it is inversely proportional.

Because: the total amount of money ÷ the number of copies subscribed = the unit price of each newspaper (certain), the number of copies subscribed by the school to the primary school mathematics newspaper is directly proportional to the amount of money;

So the answer is: yes.

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