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Notes for CBSE Class 6 Maths- Chapter 11 Algebra

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​                       CHAPTER 11 ALGEBRA
 
VARIABLE
The value of a variable is not fixed. It can take any value. Any letter can be used aa a variable.
E.g. Let’s say that there are 50 mangoes in one box and there are ‘n’ number of boxes. The total number of mangoes will be 50xn= 50n.
 
RULES FROM GEOMETRY

  • Perimeter of a square:

Let l= length of a side. Perimeter= 4xl= 4l

  • Perimeter of a rectangle:

Let l= length, b=breadth. Perimeter= 2x(l+b)
 
RULES FROM ARITHMETIC

  • Commutative property:

  • Distributive property:

ax(b+c)=(axb)+(axc)
 
EQUATION
An equation is a condition expressed using variables
There are two sides in an equation- LHS and RHS, having an equal (=) sign between them.

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