ชื่อ – สกุล .................................................................................... ชั้น............. เลขที่ ...................
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ใบงาน เรื่อง การหารทศนิยมสองตำแหน่งด้วยทศนิยมหนึ่งตำแหน่ง
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คำชี้แจง ให้นักเรียนแสดงวิธีทำหาคำตอบ ต่อไปนี้
1) 24.55 ÷ 0.5
ตอบ 24.55 ÷ 0.5 = 49.1
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5) 174.42 ÷ 1.8
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2) 90.63 ÷ 0.9
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6) 13.26 ÷ 2.6
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3) 54.29 ÷ 0.1
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7) 32.67 ÷ 3.3
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4) 1,631.52 ÷ 3.6
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8) 61.05 ÷ 5.5
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ปริมาตรปริซึม ตัวอย่างการคำนวณปริมาตรปริซึม ปริซึมสี่เหลี่ยมรูปหนึ่ง กว้าง 4 เซ็นติเมตร ยาว 8 เซ็นติเมตร และสูง 15 เซ็นติเมตร จงหาปริมาตรปริซึมสี่เหลี่ยมรูปนี้ วิธีทำ จากสูตรการหาปริมาตรของปริซึม = พื้นที่ฐาน x สูง จากรูป ฐานของรูปปริซึมสี่เหลี่ยมรูปนี้เป็นรูปสี่เหลี่ยมผืนผ้า กว้าง 4 cm. และยาว 8 cm. ดังนั้น พื้นที่ฐานรูปสี่เหลี่ยมผืนผ้า = ก x ย แทนค่าตามสูตรปริมาตรปริซึม = พื้นที่ฐาน x สูง = ก x ย x ส ...
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