Video Transcript
Which set has 12 things?
In the picture, we can see three
sets of different things. One, two, three. And it looks like our sets are all
to do with space, doesn’t it? They all contain the Sun and lots
of planets. But how many space things are in
each set? We need to find the set that has
this number here. It’s a one followed by a two. Do you know how to say this
number? It’s the number 12.
Let’s count the objects in our
first set. Are there 12 things? One, two, three, four, five, six,
seven, eight, nine, 10. And with the Sun in the middle,
this is one more than 10. This set has 11 things. Remember, we’re looking for a set
that has 12 things. What about our second set? We can count one, two, three, four,
five, six, seven, eight, nine, 10. One more than 10 is 11. Two more than 10 is the number
we’re looking for, 12. But we’ve still gotta count the Sun
in the middle, haven’t we? This set contains more than 12
things. If you want to know the name for
this number, it’s 13. But we don’t need to worry about
this. All we need to know is that this
set doesn’t contain exactly 12 things.
So we’re only left with this last
set. Let’s hope there are exactly 12
things in this set. One, two, three, four, five, six,
seven, eight, nine, 10. And we know one more than 10 is 11
and two more than 10 is called 12. We counted the things in each set
to find the set that had 12 things. And this was the set that had two
more than 10.
