Concept of a fraction |
Name: ______________________________________ Subject: _______________________ Date: _______
Write the missing word
1.- Concept of a fraction.
Three fifths is a fraction which can also be written as 3/5. Here we will use both forms.
The jar is divided into four measures. ¾ of the jar is full of milk to. There is ¼ that is empty.
The table is divided into 8 parts. 3 of them are colored in red and 5 of them are not colored, that is 5/8.
The rectangle is divided into 5 squares: 2 of them are colored in brown (2/5) and the other 3 are colored in blue, that is, 3/5.5.
In the fraction 3/5, we distinguish the numerator (3) and the denominator (5). This means that the rectangle has been divided into 5 parts and we have taken 3.
A fraction is one or several equal parts into which the unit is divided.
Answer these questions:
In the fraction 2/5, the numerator is... |
|
In the fraction ¾, the denominator is... |
|
In the fraction 3/8, the denominator is... |
|
In the fraction 1/3, the numerator is... |
2.- Fractional Unit
A fractional unit is each of the parts that are obtained by dividing a unit into equal parts.
Examples: 1/2 (one half), 1/7 (one seventh), 1/8 (one eighth).
Examples: 2/9 (two ninths), 3/10 (three tenths), 4/7 (four sevenths).
Do this exercise:
What is the fractional unit? |
|
What is the fractional number? |
|
What is the fractional unit? |
|
What is the fractional number? |
3.- How to read a fraction?
Examples: 3/11: three elevenths, 4/12: four twelfths; 4/25: four twenty fifths
What is the correct fraction?
Seven tenths |
|
Three ninth |
|
Seven thirteenths |
|
Twelve fifteenths |
4.- Proper and improper fraction.
When the numerator is less than the denominator, it is called proper fraction.
Examples: 4/6, 2/5, 1/3.
When the numerator is equal or greater than the denominator, it is called improper fraction.
Examples: 7/4, 3/3, 6/2.
Indicate if these are improper or proper fractions:
5/7 is a fraction |
|
4/4 is a fraction |
|
6/2 is a fraction |
|
1/3 is a fraction |
Examples: 6/5 = 1 1/5. It is read one and a fifth.
Indicate the correct mixed numbers:
Two and three quarters... |
|
Three and a fifth... |
|
Four and two thirds...... |
|
Two and five-sixths... |
| Educational applications |
Mathematics |
| In Spanish |
Interactive |
®Arturo Ramo García.-Record of intellectual property of Teruel (Spain)
No 141, of 29-IX-1999
Plaza Playa de Aro, 3, 1º DO 44002-TERUEL