Concept map of chapter fractions class 7
Do it in ur rough copy and then send me not the one which is coming in internet
Answers
A fraction is a number representing a part of a whole. A fraction can be expressed in the form a/b, where a, b are whole numbers and b ≠ 0.
- The numbers like ¹/₄, ²/₃, ³/₅, etc., are called fractions.
A fraction is quantity which expresses a part of whole. By the fraction ³/₅ we mean – Divide a quantity in to 5 equal parts and then take 3 parts of them.
- There are two types of fractions – Common fraction and decimal fraction.
★Numerator and Denominator of a Fraction:
»In the fraction, the below of the horizontal line is called the denominator. It expresses the number of parts into which a quantity is divided.
»The number above the horizontal line is called the numerator. It expresses the number of parts which are taken.
- Fraction = Numerator/Denominator
In a fraction, a/b we call ‘a ‘as numerator and ‘b’ as denominator.
»The fraction representing two parts out of 7 equal parts in which the whole is divided is denoted by ²/₇ and is read as "two-sevenths" . In the fraction ²/₇, 2 is called the numerator and 7 is called the denominator.
● A fraction whose numerator is lesser than the denominator is called a proper fraction.
● A fraction whose numerator is more than or equal to the denominator is called an improper fraction.
● A combination of a whole number and a proper fraction is called a mixed fraction.
● To get a fraction equivalent to a given fraction, we multiply (or divide) its numerator and denominator by the same non-zero number.
● Fractions with the same denominators are called like fractions. Otherwise, they are called unlike fractions.
● A fraction is said to be in its lowest terms if its numerator and denominator have no common factor other than 1.
★ To compare fractions, we use the following steps:
Step I: Find the least common multiple (LCM) of the denominators of the given fractions.
Step II: Convert all fractions to its equivalent fraction with denominator is equal to the least common multiple (LCM) obtained in step 1.
Step III: Arrange the fractions in descending or ascending order by arranging numerators in descending or ascending order.
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