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Math

Join our Math World now to meet up with other math students and mathematicians on the Web. Learn how to perform basic math functions, and share your own tips and tricks for solving problems and calculating answers for everything math related, from algebra to geometry to trigonometry to advanced calculus.
5-day weather forecast showing daily temperatures from January 1 to January 5.
May 2, 2010

This video shows the method to make a line graph. First step involves drawing a horizontal and vertical line joined at one end. We have to plot the maximum and minimum temperatures during 5 days. Labe ...

Math problem solving with Venn diagrams and equations.
May 2, 2010

Learn how to add rational, or fractional, numbers by following the tutorial in this video. In the case of fractions where the denominators are the same, the addition is simple: you simply add the nume ...

Woman explaining the formula for the surface area of a cylinder on a whiteboard.
May 2, 2010

This video tells us the method to find the surface area of an aluminium can or cylinder. The surface area includes the outside area of the curved portion and the aluminium top and bottom. The formula ...

Person writing a mathematical equation on a whiteboard.
May 2, 2010

This video teaches us the method to write an equation in slope intercept form and to graph it. The equation of line is y = mx + c. m is the slope and c is the y intercept or the point where it crosses ...

Mathematical problem involving expressions and simplification.
May 2, 2010

Khanacademy tackles problems involving multiplicative inverse (i.e. taking the number one and dividing it by that number) and dividing rational numbers in its simplest form (lowest common form). The ...

A teacher explaining surface area formulas on a whiteboard.
May 2, 2010

A pyramid is a three dimensional figure with the base in the form of a triangle and three slant sides to it. To find the surface area of a pyramid you have to find the area of the different pieces tha ...

Chemical calculation steps for finding the molar mass of KClO₃ and percentage composition of potassium.
May 2, 2010

In chemistry you come across problems which ask you to find the percent by mass and percent composition of each element in a chemical compound. To do this the first step is to compute the molar mass. ...

Graph of a mathematical function featuring labeled axes and equations.
May 1, 2010

Given a equation of a line, you can graph the line. A system of equations is nothing but equations of more than one line. In a single equation all the points that lie on the line, satisfy the equation ...

"How to Mutliply rational numbers and understand word problems" cover image
May 1, 2010

Rational numbers are numbers that can be expressed in the form of a/b, where a, b are integers and b is not equal to zero. Rational numbers are also called as fractions. Multiplication of fractions is ...

Probability problem involving selection of pens, markers, and a highlighter.
May 1, 2010

This video explains how to solve the problem of probability dependent events. In this video the problem is that a box contains three pens, 2 markers, and 1 highlighter. The person selects one item at ...