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- 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 < 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
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