Algebra Class 6 PPT

 Page 1


ALGEBRA 
Class - VI
Page 2


ALGEBRA 
Class - VI
Definitions
• Variable – A variable is a letter 
or symbol that represents a 
number (unknown quantity).
• 8 + n = 12
Page 3


ALGEBRA 
Class - VI
Definitions
• Variable – A variable is a letter 
or symbol that represents a 
number (unknown quantity).
• 8 + n = 12
Definitions
• A variable can use any letter of 
the alphabet.
• n + 5
• x – 7
• w - 25
Page 4


ALGEBRA 
Class - VI
Definitions
• Variable – A variable is a letter 
or symbol that represents a 
number (unknown quantity).
• 8 + n = 12
Definitions
• A variable can use any letter of 
the alphabet.
• n + 5
• x – 7
• w - 25
Definitions
• Algebraic expression – a group of 
numbers, symbols, and variables 
that express an operation or a 
series of operations.
• m + 8
• r – 3
Page 5


ALGEBRA 
Class - VI
Definitions
• Variable – A variable is a letter 
or symbol that represents a 
number (unknown quantity).
• 8 + n = 12
Definitions
• A variable can use any letter of 
the alphabet.
• n + 5
• x – 7
• w - 25
Definitions
• Algebraic expression – a group of 
numbers, symbols, and variables 
that express an operation or a 
series of operations.
• m + 8
• r – 3
Definitions
• Evaluate an algebraic expression –
To find the value of an algebraic 
expression by substituting numbers 
for variables.
• m + 8 m = 2 2 + 8 = 10
• r – 3 r = 5 5 – 3 = 2