 # Www.wmnet.org.uk/resources/gordon/Hit the button v9.swf Binary numeral system The binary or base-two numeral system is a representation for numbers that uses a radix of two. It was first described by Gottfried Leibniz, and is used by most modern computers because of its ease of implementation using digital electronics--early 20th century computers were based the on/off and true/false principles of Boolean algebra. Binary can be considered the most basic practical numeral system (the Unary system is simpler, but impractical for most computation). Representation A binary number can be represented by any set of bits (binary digits), which in turn may be represented by any mechanism capable of being in two mutually exclusive states. 0101001101011 on off off on off on + - - + - + Y N N Y N Y In keeping with customary representation of numerals using decimal digits, binary numbers are commonly written using the symbols 0 and 1. 100101 binary (explicit statement of format) 100101b (a suffix indicating binary format) 1001012 (a subscript indicating base-2 notation)

Aprende Matemáticas Los griegos fueron los grandes maestros de las Matemáticas y con los muchos e importantes descubrimientos que hicieron la elevaron a la categoría de Ciencia. Las matemáticas se componen de dos grandes ramas el Análisis y la Geometría y dentro del Análisis se encuentra la Aritmética, que es lo que aprenderemos, de momento, en estas páginas. La Aritmética estudia los números y las operaciones hechas con ellos. En estas páginas se mostrarán sencillos juegos y breves lecciones en las que se enseñarán las principales operaciones aritméticas, para aprender a sumar, restar, multiplicar y dividir con números enteros y con fracciones. En el menú puedes ver las diferentes lecciones de Matemáticas.

Modeling integers When modeling integers, we can use colored chips to represent integers. One color can represent a positive number and another color can represent a negative number Here, a yellow chip will represent a positive integer and a red chip will represent a negative integer For example, the modeling for 4, -1, and -3 are shown below: It is extremely important to know how to model a zero. For example, all the followings represent zero pair(s) And so on... Adding and subtracting integers with modeling can be extremely helpful if you are having problems understanding integers In modeling integers, adding and subtracting are always physical actions. If a board is used with the chip, adding always mean " Add something to the board" and subtraction always mean "Remove something from the board" Here, we will use a big square to represent a board Let's start with addition of integers: Example #1: -2 + -1 Put two red chips on the board. Notice that big arrow represents the "+" sign or the action of adding

3rd Grade Math Worksheets – Printable PDFs 3rd grade math worksheets on: adding three numbers, adding with carrying, notion of pre – algebra, making the subject of the formula, comparisons, decimals, fractions, ratios and percents etc. Addition Comparisons Decimals Division Fractions Geometry Graphs Mixed operations Money Multiplication Numbers and comparing Sets Subtraction Ratio-Percent Time 3rd grade math worksheets – Printable PDF activities for math practice. Sheppard Software: Fun free online learning games and activities for kids.

Conker Maths - Conker KIRFs - Balloons After extensive user testing (well some) at home on a PC and on an interactive white board during some of the numerous wet playtimes we've had this year. We're now ready to launch our latest game. Conker Maths Balloons The idea is very simple. So why not give it a go. You can access the balloon game from the Quick Start list on the right or by following this link: conkermaths.org/cmweb.nsf/products/timestablesballoons.html The following KIRFs are supported by this application: Know multiplication and division facts for the 2 times table.Know multiplication and division facts for the 3 times table.Know multiplication and division facts for the 4 times table.Know multiplication and division facts for the 5 times table.Know multiplication and division facts for the 6 times table.Know multiplication and division facts for the 7 times table.Know multiplication and division facts for the 8 times table.Know multiplication and division facts for the 9 times table.

Maths and Stats by Email | Why is A4 paper the size that it is? Tangrams You will need Copy of the printout Scissors Pens or pencils (optional) What to do Cut out each of the pieces. Arrange the pieces on a surface so their positions match the arrangement in the printout. The pieces make two squares that are the same size. What’s happening? To finish this puzzle you have to take two smaller squares and turn them into one large square. When you finish the puzzle, you’ll find the largest triangles have their diagonals along the edges of the square. Applications If you started out with two squares, each 1 metre across, the resulting large square would have a side length of √2 metres. √2 is an important number – when you multiply √2 by itself, you get 2. √2 is a tricky number to write down. For any square, to find its diagonal, simply multiply the side length by √2. More information Try tangram puzzles online