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Subtraction of Rational Numbers Covid19 has led the world to go through a phenomenal transition . Elearning is the future today. Stay Home , Stay Safe and keep learning!!! In this section we will discuss about subtraction of rational numbers.Subtraction of Rationalnumbers : In subtraction of rationalnumbers apply the same method as that of addition of rational numbers. Some solved examples : 1) Subtract 3 /4 from 5 / 6 Solution : Subtract 3 /4 from 5 / 6 ⇒ 5 / 6 – 3 / 4 As the denominators are different. LCM of 6 and 4 is 12. 5 / 6 = ( 5 x 2) / ( 6 x 2) = 10 / 12 3 / 4 = ( 3 x 3 ) / ( 4 x 3) = 9 / 12 10 / 12 – 9 / 12 = ( 10 – 9 ) / 12 = 1 / 12. ________________________________________________________________ 2) Subtract 3 / 8 from – 5 / 7 Solution : Subtract  3 / 8 from  5 / 7 ⇒  5 / 7 – (  3 / 8) As the denominators are different. LCM of 8 and 7 is 56.  5 / 7 = ( 5 x 8) / ( 7 x 8) =  40 / 56  3 / 8 = (  3 x 7 ) / ( 8 x 7) =  21 / 56  40 / 56 – ( 21 / 56 ) = ( 40 + 21 ) / 56 = 19 / 56 ( since – (  21 / 56) = + 21 / 56. ________________________________________________________________ 3) The sum of two rational numbers is 3 / 5. If one of the number is – 9/ 20. Find the other. Solution : Sum of two numbers =  3 / 5 , one number =  9 / 20. ∴ The other number = sum – one number =  3 / 5 – (  9 / 20 ) =  3 / 5 + 9 / 20 ( since [ – (  9 / 20 ) = + ( 9 / 20 ) ]
Rational number • Representation of rational number on number line • Comparison of rational number • Addition rational numbers • Subtraction of rational numbers • Conversion of rational numbers to decimal • Irrational Numbers Home Covid19 has affected physical interactions between people. Don't let it affect your learning.
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