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Operations

Whole numbers from brendastoneman

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http://www.matematicasdivertidas.com/Zonaflash/juegosflash/Cazar%20numeros.swf

INTERESTING VIDEOS

Aquí tenéis un par de vídeos para iros familiarizando con la pronunciación sobre operaciones.

MATH OPERATIONS VOCABULARY

Let's start with operations. First we are going to learn the name of the main operations, and then we will remember the order of the operations.
We can see it in the following images:

  Cardinal Numbers

PLACE VALUE SONG

LESSON 1. NATURAL NUMBERS

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LESSON 1. NATURAL NUMBERS

Empecemos con los números naturales. Veamos un poco de la historia sobre la evolución de los números:

ORIGIN AND EVOLUTION OF NATURAL NUMBERS

Natural numbers are part of everyday life.Natural numbers are the numbers used for counting or ordering things.

At first, people counted making marks in stones or bones untill a new system was invented: some symbols represented each number of things, usually to count animals.

Diferent cultures used diferent symbols. Thus, for example, Egyptians used an additive system: adding one symbol after the other to reach the desired  quantity.And Romans had a better system, with letters representing numbers.

The Roman symbols were the followings:

I	V	X	L	C	D	M
1	5	10	50	100	500	1000

You can read more at Roman Numerals

But were Indian who designed a positional system, that later Arabs introduced in Europe, so it was named the Hindu-Arabic numeral system. This was the precursor of our system of numeration.

In our decimal number system, the value of a digit depends on its position, in the number. Each place has a value of 10 times the place to its right.

Each digit in a natural number has a place value, based on its position from the right, as seen in the following place value chart.

Place Value
Millions	Hundred Thousands	Ten Thousands	Thousands	Hundreds	Tens	Units/Ones

Let's start!

Este es un blog creado para que mi experiencia bilingüe no quede en el olvido y siempre haya un sitio de referencia para mis alumnos. Como podéis imaginar soy profesora de Maths en secundaria, es decir Matemáticas en inglés, así que ¡Empezamos!