ชื่อ – สกุล .................................................................................... ชั้น............. เลขที่ ...................
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ใบงาน เรื่อง การหารทศนิยมสองตำแหน่งด้วยจำนวนนับ
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คำชี้แจง ให้นักเรียนแสดงวิธีทำหาคำตอบ ต่อไปนี้
1) 24.55 ÷ 5
ตอบ 24.55 ÷ 5 = 4.91
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5) 14608.75 ÷ 899
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2) 90.63 ÷ 3
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6) 3057.68 ÷ 74
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3) 542.79 ÷ 9
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7) 1960.23 ÷ 1083
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4) 1631.52 ÷ 6
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8) 122.88 ÷ 24
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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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