Sets

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• A set is a group of objects that are same or similar.

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• ​Sets can be big or small.

• ​Each object in a shape is called an element.

• ​We can classify shapes - put them into different groups that are same or similar.

• ​We can compare sets using greater than, less than and equal.

​Greater than

Look at this picture,

• ​The greater number faces the open mouth.

• ​Eight is greater/more than three.

• ​A set with eight elements is grater than a set with only three elements.

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​Now take a look at this picture:

• ​The open mouth faces the greater number,

• ​We read this as 20 is less than 30

• ​A set with twenty elements is less than a set with thirty elements.

​Equal

​When sets have the same number of elements, we say they are equal.

​Each set in this picture has 6 elements, therefore they are all equal sets.