CBSE Class 6-8 Math & Science Formulas — Foundation Study Guide
CBSE Class 6, 7, and 8 form the foundation of a student's academic journey. Mastering the formulas and concepts taught in these classes ensures a strong base for Class 9, 10, and beyond. This page covers all important math and science formulas for CBSE Class 6 to 8, aligned with the latest NCERT curriculum.
Whether you are learning fractions, integers, basic algebra, geometry, or introductory science, this free resource helps you revise quickly and understand concepts clearly. Use these formula sheets for daily practice, homework help, and exam preparation.
Mathematics Formulas — Class 6 to 8
Number System & Arithmetic
- Fraction: p/q where q ≠ 0
- BODMAS: Brackets → Orders → Division → Multiplication → Addition → Subtraction
- LCM × HCF = Product of two numbers
- Percentage = (Part / Whole) × 100
- Simple Interest (SI) = (P × R × T) / 100
Basic Algebra (Class 8)
- (a + b)² = a² + 2ab + b²
- (a - b)² = a² - 2ab + b²
- (a + b)(a - b) = a² - b²
- Linear equation: ax + b = 0, x = -b/a
Geometry & Mensuration
- Perimeter of rectangle = 2(l + b)
- Area of rectangle = l × b
- Area of triangle = ½ × base × height
- Area of circle = πr²
- Circumference of circle = 2πr
- Volume of cuboid = l × b × h
- Angle sum of a triangle = 180°
Science Formulas — Class 6 to 8
- Speed = Distance / Time; Distance = Speed × Time
- Density = Mass / Volume
- Pressure = Force / Area
- Heat transferred: Q = mcΔT (m = mass, c = specific heat, ΔT = temperature change)
Frequently Asked Questions
- What are the most important math formulas for CBSE Class 6 to 8?
- The most important CBSE Class 6-8 math formulas include the area and perimeter formulas for 2D shapes, simple interest formula (SI = PRT/100), algebraic identities like (a+b)² = a²+2ab+b², and basic number rules such as LCM × HCF = product of two numbers.
- What topics are covered in Class 8 CBSE Mathematics?
- CBSE Class 8 Mathematics covers rational numbers, linear equations, understanding quadrilaterals, data handling, squares and square roots, algebraic identities and factorisation, visualising solid shapes, mensuration, and introduction to graphs.
- Are CBSE Class 6-8 formulas useful for Class 9 preparation?
- Yes. CBSE Class 6-8 formulas are the foundation for Class 9 topics. Algebraic identities, mensuration formulas, and basic number theory from Class 6-8 directly connect to Class 9 chapters on polynomials, coordinate geometry, and surface areas.
Study With GyanAI
GyanAI's AI tutor can answer any Class 6-8 CBSE doubt instantly with step-by-step explanations. Try GyanAI free — no sign-up required.