18
Aug
Number systemClass 9 math tutorials, commutative law, commutative property, math, mathemafia, NCERT, properties of numbers, rational numbers
Concept: In this tutorial, you will learn to find a rational number between any two rational numbers by calculating the mean of the two numbers. It is quite simple method. There are more ways to find it, however, this is the easiest method. The tutorial is in Hindi.
Number System
- Number System – Best explained with real life examples
- Distributive property of multiplication over addition and subtraction
- Associative property of addition and multiplication
- Closure property
- Additive Identity, Multiplicative identity, Additive inverse, Reciprocal
- Commutative law explained for basic arithmetic operations
- Rational Numbers
- Integers
Polynomials
Important Concepts – Miscellaneous
Surface area and Volumes
- Area / Surface area / Volume – Introduction
- Surface Area of Cube and Cuboid
- Volume Of Cuboid and Cube
- Surface Area of Right Circular Cylinder
- Volume and capacity of Cylinder
- Right circular Cone
- Surface Area of Right circular Cone
- Volume of Cylinder vs Cone
- Litres and Cubic centimetre (cm³)
- Cubic meters to litres