Maths 5th Class

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:

• 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