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חיבור מספרים מכוונים בעזרת חיצים
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מרכז ארצי למורים למתמטיקה בחינוך העל יסודי
GeoGebra
1.) -5 + 4 = ? 2.) -2 + 8 = ? 3.) -4 + 4 = ?
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挂谷问题——三尖瓣形
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Angles in a cyclic quadrilateral
Parallel & Skew Synthesis Problem (I)
copy a triangle
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中考 2018 河南 - 22
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Equations
Isosceles Triangles
Logic
Solids or 3D Shapes
Coordinates