Video Transcript
Select the right model the
represents the equation one plus three is four.
In this question, we’re given
an equation. This is a number fact that’s
made up of numbers and symbols. And in it, we can see the
addition symbol. When this appears between two
numbers, we know we need to add them together. It means plus or add. And our number fact tells us
that one add three is four. And we know this is true, don’t
we? If we have one and another
three, we’ve got four altogether. The question asks us to select
or to choose the right model that represents the equation one plus three is
four. And we’re given four possible
answers. If we look at our models, we
can see that we’re using apples to model the equation. We’ve got green apples and red
apples being added together each time.
Now which of these models
represents the equation one plus three is four? What could we look for in our
model that would show us that this was correct? We know we’re looking for a
model where the total number of apples is four. Which models show a total of
four? The total in our first model is
one, two, three, or it is four. So, our first model could be
the correct answer. Our second model shows a total
of one, two, three apples. So, this can’t be correct. Our next model shows a total of
one, two, three, four apples again. Perhaps this is the right
model. And if we look quickly at our
final model, we can see that the total is going to be more than four. It’s more than the one above,
isn’t it?
And so, there are only two
models that show a total of four apples. But which one shows one plus
three making four? Our first model shows one, two
green apples plus one, two red apples is four apples. And our next possible answer
shows one green apple plus one, two, three red apples. This is the correct answer, one
plus three. The model that represents the
equation one plus three is four is the one that shows one green apple plus three
red apples is four apples altogether.
