Video Transcript
Subtract to find the missing
number. Seven take away four equals
what.
When we start with a number and
subtract or take away from it, that number gets less, it gets smaller. And in this question, we’re making
a number get smaller too. We need to find the answer to seven
take away four. Can you see why we describe this
calculation like this? Let’s point to each different part
as we say it. Seven take away four. Now we’ve read the number
sentence. But what does each part of it
actually mean? Seven is the number we start
with. Before we do any taking away at
all, we have seven. And can you see in the picture
there are seven counters ready for us to start?
We know that there are always five
counters on the top row of a 10 frame. So that’s five, six, seven. Now this symbol here tells us that
we need to take away or subtract. What does it mean when we take away
or subtract from a number? Well, we remove part of the number;
we take it away. And so, the number that we started
with becomes less. Well, we have seven counters here
on our 10 frame. By the end, we’re going to have
less than seven. We’re going to take some of them
away. How many do we need to take
away? Our second number tells us
this. We need to take away four.
Now, how could we show on our 10
frame that we’ve taken away four? If we had a real 10 frame in front
of us, perhaps we could pick up four counters one by one and put them in our
pockets. But this is a picture of a 10
frame. Perhaps, we could cross them
out. Remember, we need to take away
four. One, two, three, four. Our 10 frame is now four less than
it was. There were seven counters on it,
but now there are one, two, three left. We know that three and four more
make seven altogether. And so, if we start with seven and
we take away four, we’re going to be left with three. Seven take away four equals
three.
