Video Transcript
Write a decimal to match the given
model.
The model that our question is
talking about is this shape here. It’s being divided into parts, and
some of them have been shaded. Now, we might know how to describe
this model using words, maybe even as a fraction. But our question asks us to write a
decimal that matches the model.
Now, we know that a decimal is a
type of number written using digits that has a whole part and then a part that shows
less than a whole. It’s a way of showing amounts that
are less than a whole. And to separate the whole part and
the fractional part, we draw a dot, a decimal point. Now, before we write this as a
decimal, perhaps it might be useful to think about what fraction we can see. Firstly, we can see that this shape
has been divided into 10 equal parts. And it’s important that we can see
that they are equal. This means that the denominator of
our fraction is 10. And in this model, seven of those
10 parts have been shaded. So the numerator for our fraction
is seven. Seven out of 10 parts are
shaded. And we’d say this using words as
seven-tenths.
Now that we know how many tenths
our model shows, we can write the amount as a decimal. The whole part is going to be zero
because we don’t have any whole shapes that have been shaded. It’s only part of a shape. Now, the column after the decimal
point, this is the fractional part of our decimal, is worth tenths. And we know that our model shows
seven-tenths. So we’re going to need to write the
digit seven in the tenths place. We found the answer by first
working out how many tenths our model shows and then by using this information to
write the amount as a decimal. The correct answer is seven-tenths,
which we write with a zero, a decimal point, and then the digit seven.
