← All lessons

📐 Mathematics - Class 7

Home›Class 7›Mathematics›Lesson 22: Algebraic Expressions›Introducing Algebraic Expressions

Lesson 22 · Algebraic Expressions

Introducing Algebraic Expressions

MathematicsSubject

14 minEstimated read

📖Note 🔤Worked Examples 📐Construction 🔬Activity ⭐Points to Remember ✏️Practice Questions 🧪Practice Test 🎬Video 🖥️Presentation

Question 1 of 10

1In algebra, a letter stands for

← All lessons

Lesson 22 topics

Introducing Algebraic Expressions Multiplying Algebraic Expressions Dividing Algebraic Expressions

Quick Facts

Lesson: 22: Algebraic Expressions
Topic: Introducing Algebraic Expressions
Domain: Algebra

A letter holds a place for a number you do not know yet. Like terms have the same letters raised to the same powers, and only they can be added.

Study Tip

3x + 5y is not 8xy, in the same way that 3 apples plus 5 oranges is not 8 of anything. If a simplification looks doubtful, substitute numbers and compare.