That means that instead of getting the total of all numbers, you get a total of some subset. This is often used in reports. For example, you might get a subtotal for the sales by day, and another subtotal (at a different level), for the sales by month. Or you might show the data in a different order, and show subtotals (for the same sales) by region, or by salesman.
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the diffrence of somthing
In math best
Math is related to math because math(1) is technically math(2) itself, because there is really no description how math(1) is the same as math(2). There is only one math, except for types of math, like algebra.
Math is not just math you have to study it like subtration and addition. You use it on sheets or paper work.
a math book is were u learn math