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(1 / 2) Basic Excel Exam Sample

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... Read moreถ้าคุณกำลังหาซ้อม “ข้อสอบ Excel ภาคปฏิบัติ” แบบ Basic ให้ทำได้จริงในเวลาจำกัด แนะนำให้ฝึกจากโจทย์ที่ใช้ข้อมูลออเดอร์/รายการสินค้า เพราะมักออกสอบบ่อยและวัดพื้นฐานได้ครบ ทั้งการนับจำนวน การรวมยอด และการดึงข้อมูลจากตาราง 1) โจทย์แนว “นับจำนวนรายการ/คำสั่งซื้อ” สิ่งที่มักถามคือ “มีคำสั่งซื้อทั้งหมดกี่รายการ” หรือ “มีเซลล์ที่ถูกกรอกกี่ช่อง” - ใช้ COUNT เมื่อต้องการนับเฉพาะตัวเลข เช่น =COUNT(C7:C17) - ใช้ COUNTA เมื่อต้องการนับเซลล์ที่ไม่ว่าง (ตัวอักษรก็นับ) เช่น =COUNTA(D7:D17) ทริคที่ช่วยไม่พลาด: ก่อนเลือกสูตรให้ดูว่าคอลัมน์นั้นเป็นเลขล้วนหรือเป็นข้อความ (เช่น ชื่อสินค้า) เพราะใช้ COUNT ไปจะได้นับเป็น 0 ได้ง่ายมาก 2) โจทย์แนว “รวมยอดขาย/รวมจำนวน” พื้นฐานสุดคือ SUM สำหรับรวมทั้งช่วง เช่น =SUM(D7:D17) แต่ข้อสอบภาคปฏิบัติชอบออกแบบมีเงื่อนไข เช่น “รวมจำนวน ‘ดินสอ’ ทั้งหมด” - ใช้ SUMIF: =SUMIF(C7:C17,"ดินสอ",D7:D17) โดย C7:C17 คือช่วงเงื่อนไข (ชื่อสินค้า) และ D7:D17 คือช่วงที่จะนำไปบวก (จำนวน/ยอดขาย) 3) โจทย์แนว “นับแบบมีเงื่อนไข” เช่น “นับจำนวนคำสั่งซื้อที่มีจำนวนสินค้าเท่ากับ 2” หรือ “มากกว่า/น้อยกว่า” - ใช้ COUNTIF เช่น =COUNTIF(D7:D17,2) หรือ =COUNTIF(D7:D17,">=3") ทริค: เครื่องหมายเปรียบเทียบต้องใส่เป็นข้อความในเครื่องหมายคำพูดเสมอ เช่น ">=3" 4) โจทย์แนว “ดึงราคา/ประเภทจากตารางอ้างอิง” ข้อสอบมักให้ตารางรายการสินค้าและราคา แล้วให้ดึงราคามาคำนวณยอด - ใช้ VLOOKUP เช่น =VLOOKUP(C7,$C$20:$D$24,2,FALSE) จำง่าย ๆ: ล็อกช่วงตารางด้วย $ เพื่อคัดลอกสูตรลงแถวอื่นแล้วช่วงไม่เลื่อน 5) เช็กลิสต์ก่อนส่งงานสอบ (ช่วยลดคะแนนตก) - ตรวจรูปแบบข้อมูล: ตัวเลขเป็น Number จริงไหม (ไม่ใช่ Text) - ตรวจช่วงข้อมูล: ครอบช่วงถูกแถวไหม (เช่น D7:D17 ไม่หลุดไปเกิน) - ล็อกช่วงด้วย $ เมื่อมีการลากสูตร - ถ้าโจทย์ให้คำนวณยอดต่อรายการ มักเป็น “ราคา * จำนวน” เช่น =D7*E7 แล้วค่อย SUM รวมทั้งคอลัมน์ ถ้าฝึกตาม 4 กลุ่มนี้ (นับ/รวม/มีเงื่อนไข/ดึงข้อมูล) คุณจะรับมือข้อสอบ Excel ภาคปฏิบัติระดับ Basic ได้มั่นใจขึ้นมาก และทำทันเวลาในสนามสอบจริง

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