What we know about sets

What we know about sets

by Ursula Severin

Sets

• ​

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

• ​

• ​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.

​

​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.

Multiple Choice

Jervonte has six race cars, and  Caj has six trucks.  Do they have equal sets?

• No

• Yes

Multiple Choice

Janique has a set of toys. she puts all the dolls in one group, all the teddy bears in a group and all the ponnies in another group.

What has Janique done with the new sets she has made?

• add

• compare

• classify

Multiple Choice

Kaeland has seven marbles and his brother Raegan has sixteen marbles. Who has the greater set?

• Neither of them because their sets are equal

• Raegan has the greater set.

• Kaeland's set is greater.

Multiple Choice

Miss Bercassio has twelve pens and Miss Severin has ten pens.  What needs to happen so that they can have equal sets of pens?

• Miss Severin needs to give Miss Bercassio all of her pens.

• Nothing. Their sets are already equal.

• Miss Severin should find another pen.

• Miss Bercassio should give Miss Severin one of her pens.

Open Ended

When a set is greater than another set where does the aligators mouth face?

Poll

My teacher made four sets on her desk :

1. flowers

2. mangoes

3. ribbons

4. leaves

If i bring her a bunch of red roses, in which set should i put them?

• mangoes

• leaves

• flowers

• ribbons

Multiple Select

Grade 2 has teachers and students. Choose the answers to classify Grade to into two main sets.

• brothers

• teachers 

• desks

• students