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

Fill in the Blank

Isabel  an her friend Krista have the same type of water bottle.  They both filled their bottles to the top but Krista threw out some of her water. Now, Krista has ______________ water than Isabel.

Multiple Select

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

• brothers

• teachers 

• desks

• students