Video Transcript
Notice how each row is nine more
than the previous one. One times nine equals nine; two
times nine equals 18; three times nine equals 27. Find the result of the following:
Four times nine equals what. And then also find the result of
the following: Five times nine equals what.
We know that learning times tables
facts is all about thinking about groups of a certain number. And this question is all about nine
times tables facts. We can see in the pictures that
each cube is labeled with the number nine. We’re counting in nines. And the first thing that we’re told
is that each row is worth nine more than the previous one. In other words, as we go through
our nine times tables facts to find the next one, we just add another nine. So that’s why we have one times
nine is nine, and then we’ve got a new orange cube to show that nine more’s been
added. Nine add nine is 18. So that’s why we can say two times
nine is 18. If we add another nine, we get
27. And that’s why we can say three
times nine equals 27.
And next, we’re told to find the
result of four times nine. Well, to find four lots of nine, we
just need to add nine onto three lots of nine. So what’s nine more than 27? Well, we know if we had to add 10,
it would be 37. And nine is one less than this. Four times nine is 36.
And in the final part of the
question, we just need to do the same again because we need to find five times
nine. We know what four nines are, so we
just need to add one more nine. Now we know 36 add 10 would be
46. But again, nine is one less than
ten, so instead of 46, the answer is 45. If we know a nine times tables
fact, we can find the next fact by adding nine. And that’s how we found out that
four times nine is 36 and five nines are 45.
