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# CBSE Class 7 Maths Notes  for Chapter 11 Algebraic Expressions

CHAPTER 11 ALGEBRAIC EXPRESSIONS

EXPRESSION

Terms are added to form an expression. A term is a part of an expression which is formed first and then added.

A term is a product of the factors.

COEFFICIENTS

The numerical factor in a term is called the coefficient.

LIKE AND UNLIKE TERMS

Terms having same algebraic factors are called like terms.
Terms having different algebraic factors are called unlike terms.

TYPES OF EXPRESSIONS

Monomial: One term expression
Binomial: Two term expression
Trinomial: Three term expression
Polynomial: One or more term expression

SUM OR DIFFERENCE

The sum or difference of two like terms is a like term with coefficient equal to the sum or difference of the coefficients of the two like terms.
When we add two unlike terms, they are left as they are.