# Maths 5th Class

## 5th 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 < 90o
• Right Angle = 90o
• 90o < Obtuse Angle < 180o
• Zero Angle = 0o
• Straight Angle = 180o
Different Triangles used in Mathematics:
• Right Triangle = Triangle containing one 90o 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 90o
• Obtuse Triangle = Triangle having one angle more than 90o