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CBSE - VI
Addition and Subtraction of Fractions
Addition and Subtraction of Fractions
If two fractions have the same number in the denominator, then they are said to be like fractions.
Lesson Demo
Like fractions:
If two fractions have the same number in the denominator, then they are said to be like fractions.
To add like fractions:
Add the numerators of the fractions to get the numerator of the resultant fraction.
Use the common denominator of the like fractions as the denominator of the resultant fraction.
To subtract like fractions:
Subtract the numerators of the fractions to get the numerator of the resultant fraction.
Use the common denominator of the like fractions as the denominator of the resultant fraction.
Unlike fractions:
Fractions with different numbers in the denominators are said to be unlike fractions.
To add unlike fractions:
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Find their equivalent fractions with the same denominator.
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Add the numerators of the fractions to get the numerator of the resultant fraction.
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Use the common denominator of the obtained like fraction as the denominator of the resultant fraction.
To subtract unlike fractions:
-
Find their equivalent fractions with the same denominator.
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Subtract the numerators of the fractions to get the numerator of the resultant fraction.
Use the common denominator of the obtained like fraction as the denominator of the resultant fraction.
Addition or subtraction of mixed fractions:
Two mixed fractions can be added or subtracted by adding or subtracting the whole numbers of the two fractions, and then adding or subtracting the fractional parts together. Two mixed fractions can also be converted into improper fractions and then added or subtracted.