What is six times nine?
Now, this is a very straightforward
question, isn’t it? Perhaps you know the answer
already. Perhaps you can recall the number
fact and say six times nine is this. But if we were to make a video like
this, it would be very interesting to watch. let’s try going through and answer for
those of you who perhaps don’t know this fact off by heart.
If we don’t know what six times
nine is, what do we know that could help us? Well, the first thing that we can
say is that six times nine is exactly the same as nine times six. This is something you can do with
multiplication facts. You can switch the numbers around
and it still makes the same product. So, we can see that this question
is asking us to find nine lots of six. Now, maybe you don’t know nine lots
of six. But there is a nearby fact that you
probably do know, a fact that’s easy to remember when we’re learning our times
tables. And that’s 10 times six.
Now, we can use this to help. Because if we know what 10 times
six is and here are 10 columns of six counters as an example, then to find nine
times six, we just need to lose one of our columns. In other words, we need to subtract
six. Now, 10 times tables facts are
quite easy to remember. 10 times six equals 60. And so, if we take away one lot of
six from 60, this is going to take us back to 54, isn’t it? And so, we can say that nine lots
of six are 54. Or if we switched the numbers
around, six times nine equals 54.
Now, perhaps you knew this fact
already, but this is just one method you could have used if you didn’t. We’ve used a known multiplication
fact to find an unknown fact. We knew 10 times six. So, we subtracted six to find nine
times six. And nine times six or six times
nine equals 54.