2 – 1
abacus
چرتکه
An abacus is an ancient device that is used for arithmetic calculations
acute angle
زاویه تند
An acute angle is less than 90 degrees
addition
جمع
Addition is the adding of numbers to get their sum
angle
زاویه
An angle is the amount of rotation it would take to put one intersecting line on top of another
arithmetic
علم حساب
Arithmetic is the study of addition, subtraction, multiplication, and division
1,000,000,000
billion
بیلیون (در آمریکا معادل هزار میلیون و در انگلیس معادل یک میلیون میلیون)
A billion is a thousand million. The Earth is billions of years old
budget
بودجه
A budget is a written account of all income and expenses for a person, a family, an organization, or a government. People use budgets to figure out how much money they take in and plan how much they can spend and save
chart
نمودار،جدول
A chart is a diagram, like a graph or a table, that shows the relationships between things
circle
دایره
All of the points on a circle are the same distance from the center
cone
مخروط
A cone is a shape that has a point at one end and a circular opening at the other end. In mathematics, this shape is a half cone
couple
زوج، جفت
A couple refers to two people or two objects
crescent
هلال
A crescent is the shape of the moon a little before of after the time of the new moon
cube
مکعب
A cube is a solid geometric figure with six square faces
curve
خط منحنی
A curve is a wavy line
cylinder
استوانه
A cylinder is a figure with a long round body
denominator
مخرج کسر
The denominator is the bottom number in a fraction
diameter
قطر
The diameter is the longest distance from one side of a circle (or a sphere) to the other
diamond
لوزی
A diamond is a four-sided figure whose sides are all the same length. People play baseball on a diamond-shaped field
dividend
مقسوم
The dividend is the number that is divided (in long division). The dividend divided by the divisor is the quotient (plus a remainder)
division
تقسیم
Division is an operation that divides a number into portions
divisor
مقسوم علیه
The divisor is the number that the dividend is divided by (in long division). The dividend divided by the divisor is the quotient (plus a remainder)
dodecahedron
دوازده سطحی
A dodecahedron is a twelve-sided geometric solid whose faces are pentagons
2X
double
دوبرابر، مضاعف
Double means twice or two times
dozen
دو جین، دوازده عدد
Dozen is another word for twelve