Video Transcript
Modelling and Counting Eight and
Nine
In this video, we will learn how to
represent one object by another to help us count eight or nine objects. Let’s model eight using the 10
frame and our counters. One, two, three, four, five, six,
seven, eight. Eight is two less than 10. We had 10 counters and we have two
leftover. This is one way to show the number
eight. We could show eight by placing all
of our counters in a straight line. We could also show number eight
using two rows of four or four rows of two. Two, four, six, eight. There are still eight counters.
We could also represent number
eight like this, like this, or like this. We can represent the number eight
in lots of ways. The same is true of the number
nine. Nine is one less than 10. If we have 10 counters and we place
nine in a ten frame, we will have one counter left. We can represent the number nine in
lots of ways. It doesn’t matter how we place the
counter or which pattern we make. There are still nine counters.
Sometimes when we’re asked to count
a number of objects, they could be placed randomly. That means there’s no pattern that
we can see. It’s hard to count objects when
they’re placed randomly. But if we place all our counters in
a ten frame, it helps us to count them more easily. One, two, three, four, five, six,
seven, eight, nine. Let’s practise modelling and
counting eight and nine objects.
Count the giraffes. Show the same number using
trees.
We’re shown a picture of some
giraffes, and the first thing the question tells us is to count them. Let’s use counters to represent
each of the giraffes to make sure we count them accurately. One, two, three, four, five, six,
seven, eight, nine. The second part of the question
tells us that we have to show the same number of trees. If there are nine giraffes, then we
need nine trees. One, two, three, four, five, six,
seven, eight, nine. We counted the giraffes. We used counters to help. There are nine giraffes and nine
trees. To show the same number of trees as
giraffes, we needed nine trees.
Count the elephants. Show the same number using
balls.
We’re shown a number of
elephants. And the first part of the question
tells us to count them. Let’s use counters to help make
sure we count them all correctly. One, two, three, four, five, six,
seven, eight. There are eight elephants. We have to show the same number
using the balls. Which of our three groups of balls
shows the number eight? Let’s look at the first
picture. Does this show eight balls?
Let’s check using our counters. One, two, three, four, five, six,
seven, eight. This picture shows the correct
number of balls. There are eight elephants and eight
balls. This picture only has six
balls. We would need two more to show
eight. Six is two less than eight. And this picture has nine
balls. It has one more ball than
eight. We would need to take one ball away
to show eight. We counted eight elephants and we
showed the same number using balls.
Place a counter in the ten frame for
each of the rabbits.
We’re shown a number of
rabbits. We have to count them by placing a
counter in the ten frame for each of the rabbits. Each time we count a rabbit, we
have to place a counter in the ten frame. One, two, three, four, five, six,
seven, eight, nine. There are nine rabbits and nine
counters in the ten frame. Nine is one less than 10. That’s why there’s one space left
in the ten frame. Which of these ten frames shows the
number nine.
The first ten frame is full, which
means it has 10 counters. But the second frame has one less,
which means it has nine. This is the ten frame that shows the
number of rabbits. There are nine rabbits and nine
counters. The third ten frame has two less
than 10, which means there are eight counters. The ten frame, which shows the
correct number, is the one which shows nine counters.
What have we learned in this
video? We’ve learned how to use models to
help us count eight or nine objects accurately. We’ve also learned that we could
use objects such as counters to help us count eight or nine objects.
