Video Transcript
Complete the following sentence:
Two-thirds and what make a whole.
In this question, we’re given a
sentence that we need to complete. This is a little bit like an
addition sentence. It’s about putting two parts
together to make a total amount. Now one of the parts that we’re
given is this fraction here, two-thirds. We don’t know what the second part
is. This is the part we need to
find. So we put something together with
two-thirds and we make a whole. What goes together with two-thirds
to make one whole?
Well, underneath our sentence, did
you notice we’ve got quite a helpful little diagram to help us? It’s a long, thin rectangle, little
bit like a strip of paper. In fact, shall we imagine that it’s
a strip of paper. We could say that it’s worth one
whole strip. Let’s label it with the number
one. But we can also see something else
about this strip of paper. It’s been divided or split up into
three equal parts. Each part is worth one-third. And so we can see just by looking
at this picture one very important piece of information that’s gonna help us answer
the question. How many thirds make up one
whole? We can see that three-thirds make a
whole, can’t we? And we can use this fact to help
us.
Now we said that the first fraction
in our sentence was two-thirds. But we also said that one whole is
the same as three-thirds. So if we’ve already got two-thirds
and we want to get three-thirds, how many thirds do we need to add? Two-thirds plus one more third make
three-thirds, doesn’t it? So we can say that two-thirds and
one-third make a whole. And so the missing part of our
sentence is a fraction. The answer is one- third.
