How to use Workday()......Weeknum() in Excel

វីដេអូនេះបង្កើតឡើងដើម្បី៖
១.បង្រៀនលោកអ្នកយល់ដឹងការប្រើប្រាស់មុខងារនានាដែលមានក្នុងកម្មវិធី Microsoft Excel
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