5^{th} Class Mathematics
Mathematics is very necessary in understanding chemistry very well, so
we now publish some basics of mathematics from class 5th maths. Hope you like our work.
Multiplication: operation to get no. of times of given no.
eg 5x5 = 25
Vedic trick of multiplication
HCM (Highest Common Multiple) and LCM (Lowest Common Multiple) :
HCM: 5
LCM: 5x3x2x5x7=1050
Fraction=Numerator/Denominator
Profit = selling price  cost
price
Loss = cost price  selling
price
Profit%
= (profit x 100)/cost price
Loss%
= (loss x 100)/cost price
Amount
= principle + interest
Simple
Interest = principle x rate% x time
Simple
Interest = (principle x rate x time)/100
AM
= antemeridian
PM
= postmeridian
Big Units

Small Units

Kilo = 1000 times

Deci = 1/10

Hecto = 100 times

Centi = 1/100

Deco = 10 times

Mili = 1/1000

Perimeter:
Perimeter
of Triangle = sum of lengths of all three sides of triangle.
Perimeter
of Rectangle = 2 (Length + Breadth)
Perimeter
of Square = 4 x ( Length of any one side)
Area:
Area
of Rectangle = Length x Breadth
Area
of Square = Side x Side
Different
Angles used in Mathematics:
 90^{o
}< Obtuse Angle < 180^{o}
Different
Triangles used in Mathematics:
 Right
Triangle = Triangle containing one 90^{o} angle
 Equilateral Triangle = Triangle
having three equal sides and three equal angles, and have each angle of 60°.
 Isosceles Triangle = Triangle
having two equal sides and two equal angles.
 Scalene Triangle = triangle
having different length of sides.
 Acute Triangle = Triangle
having all three angles less than 90^{o }
 Obtuse Triangle = Triangle
having one angle more than 90^{o}
^{ }