# Rational Number Formulas for Class 8 Maths Chapter 1

## Rational Number Formulas for Class 8

Are you looking for rational numbers formulas or important points which is required to understand rational number for class 8 maths chapter 1? You are the right place to get all information about rational number class 8 maths chapters 1. Rational number formulas play a vital role in preparing you for the class 8 exam as well as higher studies. Rational number formulas are very helpful for better scores in the exam.  Check Rational number formulas according to class 8:

 $\ Additive\;Identity=> a + 0 = a$ $\ Multiplicative\;Identity=> a \times 1 = a$ $\ Reciprocal\;or\;Multiplicative\;Inverse=> \left( {\frac{a}{b}} \right) \times \left( {\frac{b}{a}} \right) = 1$ $\ Distributive\;Property=> a(b + c) = ab + ac \;and\; a(b-c) = ab-ac$ $\ Additive\; Inverse\; of\; \frac{a}{b} \;is \; \frac{a}{b} \;and\; vice-versa$ $\ Commutative\;Property\;of\;Addition=> a + b = b + a$ $\ Commutative\;Property\;of\;Subtraction=> a-b \ne b-a$ $\ Commutative\;Property\;of\;Multiplication=> a \times b = b \times a$ $\ Commutativity\;of\;Division=> \frac{a}{b} \ne \frac{b}{a}$ $\ Associative\;Property\;of\;Addition=> (a + b) + c = a + (b + c)$ $\ Associative\;Property\;of\;Subtraction=> (a-b)-c \ne a-(b-c)$ $\ Associative\;Property\;of\;Multiplication=> (a \times b) \times c = a \times (b \times c)$ $\ Associative\;Property\;of\;Division=> \frac{{\left( {\frac{a}{b}} \right)}}{c} \ne \frac{a}{{\left( {\frac{b}{c}} \right)}}$

#### Summary of Rational Number

We have shared very important formulas for rational numbers which is help to score in the class 8 exams. If you have any questions and doubts related too rational number please let me know through comment or mail as well as social media. When you understand the formulas behind each rational number topics then it would be easier to solve the most complex problems related to a rational number too.

Chapter-wise Maths Formulas for Class 8

### NCERT Solutions Class 8 Maths By Chapters

• Chapter 1 – Rational Numbers
• Chapter 2 – Linear Equations in One Variable
• Chapter 3 – Understanding Quadrilaterals
• Chapter 4 – Practical Geometry
• Chapter 5 – Data Handling
• Chapter 6 – Squares and Square Roots
• Chapter 7 – Cubes and Cube Roots
• Chapter 8 – Comparing Quantities
• Chapter 9 – Algebraic Expressions and Identities
• Chapter 10 – Visualising Solid Shapes
• Chapter 11 – Mensuration
• Chapter 12 – Exponents and Powers
• Chapter 13 – Direct and Inverse Proportions
• Chapter 14 – Factorisation
• Chapter 15 – Introduction to Graphs
• Chapter 16 – Playing with Numbers