Algebra: First Course (Classic Reprint) - Tapa dura

Sinopsis

Excerpt from Algebra: First Course

Now in applying the operations of arithmetic to actual problems, we usually deal with objects of a definite sort. We say 3 apples, 3 seconds, 3 feet, 3 quarts, and so on. For example, if we put 3 oranges and 4 apples into a basket, the basket contains 7 Objects, but neither 7 oranges nor 7 apples. That is, if the number which results from the addition of several others is to represent so many Objects Of a certain kind, then all the numbers which are added must represent objects of the same kind.

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