Average expression:
Let a1. a2. a3. …… . an be a set of Numberss. mean = ( a1 + a2 + a3. +……+ an ) /n
Fractions expressions:
Converting a assorted figure to an improper fraction:
Converting an improper fraction to a assorted figure:
Formula for a proportion:
In a proportion. the merchandise of the extremes ( ad ) equal the merchandise of the agencies ( bc ) .
Therefore. ad = bc
Percentage:
Percentage to fraction: x % = x/100
Percentage expression: Rate/100 = Percentage/base
Rate: The per centum.
Base: The sum you are taking the per centum of.
Percentage: The reply obtained by multiplying the base by the rate
Consumer math expressions:
Discount = list monetary value ? price reduction rate
Sale monetary value = list monetary value ? price reduction
Discount rate = price reduction ? list monetary value
Gross saless revenue enhancement = monetary value of point ? revenue enhancement rate
Interest = chief ? rate of involvement ? clip
Tips = cost of repasts ? tip rate
Commission = cost of service ? committee rate
Geometry expressions:
Margin:
Margin of a square: s + s + s + s
s: length of one side
Margin of a rectangle: cubic decimeter + tungsten + cubic decimeter + tungsten
cubic decimeter: length
tungsten: breadth
Margin of a trigon: a + B + degree Celsius
a. b. and degree Celsius: lengths of the 3 sides
Area:
Area of a square: s ? s
s: length of one side
Area of a rectangle: cubic decimeter ? tungsten
cubic decimeter: length
tungsten: breadth
Area of a trigon: ( b ? H ) /2
B: length of base
H: length of tallness
Area of a trapezoid: ( b1 + b2 ) ? h/2
b1 and b2: parallel sides or the bases
H: length of tallness
volume:
Volume of a regular hexahedron: s ? s ? s
s: length of one side
Volume of a box: cubic decimeter ? tungsten ? H
cubic decimeter: length
tungsten: breadth
H: tallness
Volume of a domain: ( 4/3 ) ? pi ? r3
pi: 3. 14
R: radius of domain
Volume of a triangular prism: country of trigon ? Height = ( 1/2 base ? tallness ) ? Height base: length of the base of the trigon
tallness: tallness of the trigon
Height: tallness of the triangular prism
Volume of a cylinder: pi ? r2 ? Height
pi: 3. 14
R: radius of the circle of the base
Height: tallness of the cylinder
