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 5×5 = 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:
 Acute Angle < 90^{o}
 Right Angle = 90^{o}
 90^{o }< Obtuse Angle < 180^{o}
 Zero Angle = 0^{o}
 Straight 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}
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