The volume of a 3D shape is the amount of space inside it. Volume is measured in cubic units such as cm³ and m³. The volume, or capacity, of liquids is measured in millilitres or litres. The surface ...
Schools sometimes teach “fact families:” triangles that connect three numbers based on their sum and differences. For example, the triangle below expresses the series of relationships: 5 + 3 = 8, 8 - ...
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