Video Transcript
Which is the greatest number from
three, four, two, and one?
We’re given four numbers here and
we’re asked which is the greatest number. Now, our four numbers are not in
order at the moment. So, we can’t just look at the last
one and say that that must be the greatest. Let’s use a matching strategy to
find the greatest number. First of all, we could make each
number out of counters. Three, four, two, and one. Now, out of these four numbers,
we’re asked to find the greatest number. Remember, another way of saying
greatest is the largest number, the number that’s more than all the others. So, we’re looking for the group of
counters that contains more than all the others.
Let’s match up the counters one by
one to see which group contains more than all the others. Each time we match a counter, we’ll
count aloud. One. Look how we’ve got no more counters
to match in this group. The number one must be the smallest
number. Let’s carry on matching. Two. There’s no more to match in this
group. So, the number two is the next
smallest number. Three. Now, if we look at all of our
groups, only one of them has any counters we haven’t matched. Our group of four counters has one
counter left over.
We’ve used a matching strategy to
find the largest number of counters. And we can use this to be able to
tell what the greatest number from three, four, two, and one is. It’s the number four.
