Video Transcript
There are seven squares. Pick the model that has one more
square.
How good are you at finding one
more than a number? In the first picture, we can see
some colored squares in a line, and we’re told there are seven of them. And then we’re given some more
models just like this. But we’re told to pick the one that
has one more square, in other words, one more than seven. Now what does one more than seven
look like? Well, if we put one more square
onto our row at the top, it would look like this. Instead of seven squares, we’ve now
made a new number, and this number is one more than seven. It’s the next number after
seven. Can you guess what number we’re
looking for? One, two, three, four, five, six,
seven, eight. One more than seven is eight. It’s the next number we say after
seven. And so we’re looking for a row of
squares that has eight squares in it.
Do you think our first model has
eight squares? Looks like this line of squares is
a little bit short, doesn’t it? Let’s count the squares anyway. One, two, three, four, five,
six. This model didn’t even get as far
as seven squares, let alone one more than seven. This isn’t the right answer. Our second model looks like it
might be longer than seven squares. Do you think this one might be
eight squares long? Well, you know, we can be a bit
clever with this one, and we can look at it very carefully before we begin to
count. Look at the colors of each square
in each model. They all begin with a yellow square
and then it goes yellow, green, yellow, green, and so on, doesn’t it?
So when we look at our seven
squares at the top, what color are we expecting the eighth square to be? The seventh square is yellow. So we’d probably expect the eighth
square, the last square, to be green, wouldn’t we? But in the second model, we can see
that the last square is yellow. Let’s make a guess. Do you think this is going to be
the right answer or not? We’d better count to find out. One, two, three, four, five,
six. Well, we’ve got to seven squares,
but we can see that this model doesn’t show one more than seven. It shows two more than seven,
seven, eight, nine squares. Looks like we were right with our
guess about the colors, weren’t we? So we’re only left with one more
model.
This time, it does end with a green
square, so it looks like we might be right, but there’s only one way we can find
out. One, two, three, four, five, six,
seven, and one more than seven is eight. Eight is one more than seven, and
so we were looking for the model that had eight squares in it. We started off with seven squares,
and the model that has one more square than seven squares is the one that contains
eight squares.
