8th Class Maths & Science Study Material

Download Free video Lectures for class 8th Hindi and English Medium NCERT solution chapterwise pdf of NCERT book NCERT Exemplar Problem pdf of all chapters and Exercise 1 to 15th as per new syllabus of CBSE Haryana Board UP MP Free Online Quiz for Mathematics and Science Multiple Choice Questions MCQs Study Material Useful for National Means Cum Merit Scholarship Exam NMMS

Class 8 Maths Chapterwise NCERT Videos

7th Maths NCERT Book Download

Main Contents in class 8th NCERT Book Mathematics

Chapter 1 Rational Numbers

परिमेय संख्याएँ

In this chapter we have discussed that Rational numbers are closed under the operations of addition, subtraction and muliplication, addition and multiplication are commutative and associative, 0 is additive identity and 1 is the multiplicative identity. Additive inverse and multiplicative inverse of a rational number. Distributive property NCERT solution of all questions Exercise 1.1, 1.2

Chapter 2 Linear Equations in One Variable

एक चर वाले रैखिक समीकरण

The equations having highest power of the variable appearing in the equation is 1 are called lnear equation. A linear equation may have for its solution any rational number. Reducing equation to linear equation by multiplying both sides of the equation by suitable expression. uses of linear equations in finding perimeters currencey notes ages problems etc. Exercise 2.1, 2.2, 2.3, 2.4, 2.5, 5.6, 2.7

Chapter 3 Understanding Quadrilaterals

चतुर्भुजों को समझना

In this chapter we have disscussed the different types of Quadrilateral like Parallelogram - aquadrilateral with each pair of opposite sides parallel. , Rhombus, Rectangle, Square, Kite NCERT Solution of Exercise 3.1, 3.2, 3.3, 3.4

Chapter 4 Practical Geometry

प्रायोगिक ज्यामिति

in this chapter we have discussed that five measurements can determine a quadrilateal uniquely. A quadrilateral can be constructed uniquely if the lengths of its four sides and a diagonal is given or its two diagonals and three sides are known or its two adjacent sides and three angles are known or if its three sides and two included angles are given. Exercise 4.1,4.2,4.3,4.4, 4.5

Chapter 5 Data Handling

आँकड़ों का प्रबंधन

Concept of raw data, frequency histogram circle graph pie chart random experimentProbailit of an event. Exercise 5.1, 5.2 and 5.3

Chapter 6 Squares and Square Roots

वर्ग और वर्गमूल

Square numbers and Square roots - all squae numbers end with 0, 1,4,,6 or 9 at unit place also square numbers can only have even numbers of zeros at the end. Square root is the inverse operation of square. There are two integral square roots of a perfect square number. NCERT Book Exercise 6.1, 6.2, 6.3, 6.4

Chapter 7 Cube and Cube Roots

घन और घनमूल

Hardy-Ramanujan Numbers those numbers which can be expressed as sum of two cubes in two different ways like 1729, 414, 13832. Cube numbers- nuber obtained by multiplying by itself three times . Perfect cube- a number in prime factorisation of which each factor appears three times is known as perfect cube. 7.1, 7.2

Chapter 8 Comparing Quantities

राशियों की तुलना

Recalling Ratios and Percentages, finding Increase or decrease percent, discounts, profit and Loss Sale tax value added tax Goods and Services tax Compound Interest compound interest formula NCERT Solution of Exercise 8.1, 8.2 and 8.3

Chapter 9 Algebraic Expressions and Identities

बीजीय व्यंजक एवं सर्वसमिकाएँ

Adding and subtracting Polynomials multiplying algebric expressions findingarea of a rectangle and sides of . use of stanard identities Exercise Solution 9.1, 9.2, 9.3,9.4

Chapter 10 Visualising Solid Shapes

ठोस आकारों का चित्रण

Front side and top views of 3D Shapes mapping space around us Faces edges and Vertices Euler's Formula F + V = E + 2 Exercise 10.1, 10.2, 10.3, 10.4 , 10.5 with miscellaneous questions

Chapter 11 Mensuration

क्षेत्रमिति

Area of a trapezium and rhombus. surface area of Cuboid cube and cylinder. Volume of cuboid cube and cylinder Exercise 11.1, 11.2, 11.3, 11.4

Chapter 12 Exponents and Powers

घातांक और घात

Power with negative exponets laws of exponents useses of exponents to express small numbers in standard form. Comparing very large and ery small numbers NCERT Book Exercise 12.1,12.2

Chapter 13 Direct and Inverse Proportions

सीधा और प्रतिलोम समानुपात

Direct Proportion and Inverse Proportion Exercise 13.1, 13.2

Chapter 14 Factorisation

गुणनखंडन

Factors of algebraic expressions method of common factors factorisation by regrouping terms and using identities. Division of algebraic expressions Exercise 14.1, 14.2, 14.3 and 14.4

Chapter 15 Introduction to Graphs

आलेखों से परिचय

Bar Graph Pie Graph or circle graph Histogram line graph Linear Graphs Coordinates Quantity and cost Principal and Simple InterestTime and Distance Exercise 15.1, 15.2, 15.3

Chapter 16 Playing with Numbers

संख्याओं के साथ खेलना

Numbers can be written in general form e.g. a two digit number ab will be written as ab= 10a +b, use of general form of numbers for solving puzzles or number games. Divisibility rules. Exercise 15.1, 15.2, 15.3