Last Minute Revision Class 8 Maths Annual - Class 8 Maths

Class 8 Mathematics: Key Concepts and Exam-Focused Revision

Rational Numbers and Their Properties Rational numbers are numbers that can be expressed in the form $P/Q$, where $P$ and $Q$ are integers and $Q \neq 0$. The closure property holds for addition, subtraction, and multiplication, but not for division....

a² – (–a)² is equal to

0

A couple went to a shopping mall and purchased one shirt and one saree at Rs. 750 and Rs. 1200 respectively. The shopkeeper offered a discount of 15% on the bill amount. What is the Selling price of the two items?

Rs. 1657.50

What is the approximate value of the square root of 48?

7

Which property is NOT true for division of rational numbers?

Associativity

What is the definition of a centroid in a triangle?

The centroid is defined as the point of intersection of all three medians in a triangle. A median connects a vertex to the midpoint of the opposite side.

What is the formula used to calculate the depreciated value of an asset after 'n' periods?

$A = P(1 - \frac{R}{100})^n$ — where $A$ is the current value, $P$ is the principal (initial) value, $R$ is the rate of depreciation per period, and $n$ is the number of periods.