Video Transcript
What is 28 divided by four?
This question tests our ability to
divide by four. But what does it mean to divide 28
by four? What’s this question asking us to
do? Well, we can think of this question
in two different ways, and we can use the array that we’re given to show these. One way we could think of this
question is as 28 split into groups of four. How many groups are there? In other words, how many fours are
there in 28? And we can show this on our
array. Can you see any groups of four? Each of the columns in the array
shows four counters, doesn’t it? So if we count the number of
columns we’ve got, this is the number of fours we’ve got. Let’s split our array into groups
of four.
We’ve got one, two, three, four,
five, six, seven groups of four. But you know, there’s another way
we could think about this division. This time, we could think of it as
asking, what’s 28 split into four equal groups? How many will there be in each
group? Let’s sketch the same array, but
we’re going to split it up in a slightly different way and show how we can find
exactly the same answer. So we’ll start with 28 counters
again. This time, we’re going to split
them into four equal groups. Can you see how we can do this? There are four rows aren’t
there.
So if we think of each row in our
array as a group, we can just ask ourselves how many in each row? And of course, we know there are
seven counters in each row. So whether we split 28 counters
into groups of four and count the groups or we split 28 into four equal groups and
count the number of counters in each group, we get exactly the same answer. 28 divided by four equals
seven.
