Ministerio De Educacion: Veintiocho Cerillas

Practice your mental math by finding two numbers knowing their sum and difference.

See if you can connect the dots of the same color with horizontal and vertical segments without leaving the grid and without intersecting the lines or crossing the colored dots.

These are five interactive units for Elementary math. Each unit is structured in four parts: explanation, activities, dictionary and assessment.

Practice your mental math by finding two numbers knowing their difference and product.

Take this challenge by trying to put in order the pieces from 1 through 15. Geogebra plugin required.

Try to find the line of symmetry of these 8 figures. If you find it the two figures should coincide.

This is a game about the product of two numbers from 1 to 9. A group of two players are needed for this game.

Can you make the second arrow the same size as the first? You will be surprised.

This application has a simulation which computes the product of two numbers and the square of a number.

Practice your mental math with this application by finding the sum of two: whole numbers, integers, decimals or fractions. You can choose two different levels of difficulty.