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Algebraic Expressions Class 7 PPT

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O b j e c t i v e s :
? To understand the formation of Algebraic Expressions
?To add & subtract Algebraic Expressions
?Simplify Algebraic Expressions
?To find value of Algebraic Expressions
Page 3


O b j e c t i v e s :
? To understand the formation of Algebraic Expressions
?To add & subtract Algebraic Expressions
?Simplify Algebraic Expressions
?To find value of Algebraic Expressions
?Algebraic expressions are formed from variables and
constants. We use the operations of addition, subtraction,
multiplication and division on the variables and constants to
form expressions. For example, the expression 2xy + 5 is
formed from the variables x and y and constants 2 and 5.
The constants 2 and 5 and the variables x and y are
multiplied to give the product 2xy and the constant 5is
added to this product to give the expression.
Page 4


O b j e c t i v e s :
? To understand the formation of Algebraic Expressions
?To add & subtract Algebraic Expressions
?Simplify Algebraic Expressions
?To find value of Algebraic Expressions
?Algebraic expressions are formed from variables and
constants. We use the operations of addition, subtraction,
multiplication and division on the variables and constants to
form expressions. For example, the expression 2xy + 5 is
formed from the variables x and y and constants 2 and 5.
The constants 2 and 5 and the variables x and y are
multiplied to give the product 2xy and the constant 5is
added to this product to give the expression.
? Expressions are made up of t e r m s. Terms are a d d e d to make
an expression. For example, the addition of the terms 4 x y
and 7 gives the expression 4 x y + 7 .
? A term is a p r o d u c t o f f a c t o r s. The term 4 x y in the
expression 2 x y + 5 is a product of factors x, y and 2 Factors
containing variables are said to be a l g e b r a i c f a c t o r s.
? The c o e f f i c i e n t is the numerical factor in the term.
Sometimes anyone factor in a term is called the coefficient
of the remaining part of the term.
Page 5


O b j e c t i v e s :
? To understand the formation of Algebraic Expressions
?To add & subtract Algebraic Expressions
?Simplify Algebraic Expressions
?To find value of Algebraic Expressions
?Algebraic expressions are formed from variables and
constants. We use the operations of addition, subtraction,
multiplication and division on the variables and constants to
form expressions. For example, the expression 2xy + 5 is
formed from the variables x and y and constants 2 and 5.
The constants 2 and 5 and the variables x and y are
multiplied to give the product 2xy and the constant 5is
added to this product to give the expression.
? Expressions are made up of t e r m s. Terms are a d d e d to make
an expression. For example, the addition of the terms 4 x y
and 7 gives the expression 4 x y + 7 .
? A term is a p r o d u c t o f f a c t o r s. The term 4 x y in the
expression 2 x y + 5 is a product of factors x, y and 2 Factors
containing variables are said to be a l g e b r a i c f a c t o r s.
? The c o e f f i c i e n t is the numerical factor in the term.
Sometimes anyone factor in a term is called the coefficient
of the remaining part of the term.
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FAQs on Algebraic Expressions Class 7 PPT

1. What are algebraic expressions?
Ans. Algebraic expressions are mathematical expressions that consist of variables, constants, and mathematical operations such as addition, subtraction, multiplication, and division. These expressions are used to represent unknown quantities and can be simplified or evaluated by substituting values for the variables.
2. How do you simplify algebraic expressions?
Ans. To simplify algebraic expressions, combine like terms by adding or subtracting them. Like terms have the same variables raised to the same powers. Then, perform any necessary operations such as multiplication or division. Finally, simplify the expression as much as possible by applying the order of operations.
3. What is the difference between an equation and an expression?
Ans. An expression is a mathematical phrase that contains variables, constants, and mathematical operations. It represents a value or quantity. On the other hand, an equation is a statement that asserts the equality of two expressions. Equations contain an equal sign and can be solved to find the value of the variable.
4. How do you evaluate algebraic expressions?
Ans. To evaluate algebraic expressions, substitute the given values for the variables in the expression and simplify the expression using the order of operations. Replace each variable with its corresponding value and perform the operations according to the rules of arithmetic.
5. Can you give an example of an algebraic expression?
Ans. Sure! An example of an algebraic expression is "3x + 2y - 5z". In this expression, "x", "y", and "z" are variables, and "3", "2", and "5" are constants. The expression represents a combination of terms involving addition and subtraction of variables and constants.
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