Video Transcript
There are four red birds and
two yellow birds. Fill in the blanks. Four plus two equals what. Six take away what equals
two. Two plus what equals six. And six take away what equals
four.
This question is getting us to
think about how addition and subtraction facts are linked. We’re told that the picture
shows four red birds and two yellow birds. These are two parts that go
together to make a whole amount. And in our first question, we
can find out what that whole amount is because we’re asked to add the two parts
together, four plus two equals what.
To find the answer, we can just
count on another two from four: four, five, six. Four plus two equals six. These three numbers belong in a
family together because the two parts go together to make a whole. And we’re going to use the
numbers four, two, and six in each of the number facts that we need to fill
in.
Our second number fact says six
take away what leaves us with two. Well, if we look at the model
we’ve made out of cubes, we can see the two that we want to have left over at
the end. So how many cubes are we going
to take away to leave us with this two? One, two, three, four. Six take away four leaves us
with two. And we know this because four
and two are two parts that go together to make six.
We could keep our model as it
is for a moment because our next question says two plus what equal six. Perhaps you can see which one
of our three numbers is going to be the answer. But let’s use cubes to model
this. What are we going to add to two
that gives us a total of six? One, two, three, four. Of course, the number that goes
together with two to make six is the number of red birds. Two plus four equals six.
Our final number sentence says
six take away what equals four. So, at the end of the
subtraction, we want to be left with four. How many do we need to take
away? One, two. Two and four are two parts that
go together to make a total or whole amount six. And we’ve used these numbers,
two, four, and six, to write down some different addition and subtraction facts
that are all in the same family. Four plus two equals six. Six take away four equals
two. Two plus four equals six. And six take away two equals
four.
