Page 5 - Matematica_Mathematics - Fractii_Fractions

Practice

2. Write the subunit fractions with the denominator 7.

8 slices form the whole pizza and the corresponding fraction is 8/8. Fractions
that have the numerator equal to the denominator are equunitary fractions (“fracții
echiunitare”). Their value is equal to 1.

Practice
3. Circle the equunitar fractions in the string.

_ 2 _ 4 _ 2 _ 3 _ 5 _ 8 _ 7 _ 5 _ 4 _ 1
4 5 2 9 5 8 9 6 4 7

Fractions that have the numerator bigger than the denominator, for example 9/8 superunit fractions
(“fracții supraunitare”) that are bigger than 1. If you cut the pizza into 8 and you need 9 equal slices, you will
have to cut another pizza into 8 and complete from here with another slice.

Take, for example, the fraction 2/5 We note that the numerator is less than the denominator, so it is a
subunit fraction. If we want to represent it on the number axis, we can safely say that it is between 0 and 1,
because its value is less than 1.

We divide the segment from 0 to 1 into 5 equal parts, each of which is a fifth. Now we can easily
determine the place of the fraction 2/5 on the axis.

Equunitary fractions such as 5/5, 8/8 or 10/10 corresponds to them on the axis number 1.
To find out the place on the axis of a superunit fraction (let’s take as an example 18/4) we can first
determine how many integers this fraction has, through the division operation.

2 _
18 : 4 = 4 (remainder2). In other words, 18 _ has 4 integers and .
4 4

Now that you have remembered so many mathematical things, it will be very easy for
you to face the challenges of fifth grade.