Math Filters Front Sums The Front Sums filter is a so called "math filter". Math filters are created through calculations. You get the sum of a number by adding up the digits within that number. The is the first digit of that sum. If the sum is only one digit the Front Sums filter returns 0. To show you how to calculate the Front Sums filter select one of the links below for a step by step example.
Front Sums
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