ADICION SUSTRACCION, MULTIPLICACION Y DIVISION DE DECIMALES


ADICIÓN Y SUSTRACCIÓN DE DECIMALES
Para sumar o restar decimales se sigue el mismo procedimiento que la suma o resta de los números enteros, estos son los pasos:  
* Se escriben los números uno sobre el otro, teniendo cuidado que la COMA DECIMAL se encuentre en la misma columna.
* Si faltan unidades completar colocando ceros a la derecha.
* Se suman o restan como si fueran números enteros.
* En el resultado colocar la coma en LA MISMA COLUMNA.
Ejemplos:
ADICIÓN DE DECIMALES
Suma los siguientes decimales:




SUSTRACCIÓN DE DECIMALES
Resta los siguientes decimales:



MULTIPLICACIÓN DE DECIMALES

Para multiplicar dos números decimales, se siguen los siguientes pasos:
1. Se multiplican como si fueran números naturales.
2. Se coloca la coma en el resultado, contando de derecha a izquierda tantas cifras como decimales sumen los dos factores.

Ejemplos:

1. Multiplica:  321, 6  por 7, 9
Solución:

2. Multiplica:  536,18  por 4, 6

Solución:

Más ejemplos:

Multiplicar un Decimal por 10, 100, 1.000...

Para multiplicar un número decimal por la unidad seguida de ceros, se desplaza la coma hacia la DERECHA tantos lugares como ceros acompañen a la unidad.
VER AQUÍ cómo se multiplica. Es FÁCIL

Más Ejemplos:    Efectuar las siguientes multiplicaciones:


DIVISIÓN DE DECIMALES

Para dividir decimales se acostumbra convertir al Dividendo y al Divisor en números enteros, multiplicando por 10 ; 100 ; 1000... según convenga, luego se dividen como te explicamos a continuación.
Ejemplos:

DIVISIÓN DE UN DECIMAL ENTRE UN ENTERO.

1. Divide  13,5 entre 6

2. Divide  13,5 entre 6
     Es el mismo ejercicio anterior, pero ahora dividiremos con el otro método, multiplicamos por 10 porque hay un sólo decimal:


3. Divide  856,5 entre 25
Multiplicamos por 10 porque hay un sólo decimal:

4. Divide  6,82 entre 2
Multiplicamos por 100 porque hay dos decimales:



DIVISIÓN DE UN ENTERO ENTRE UN DECIMAL.

5. Divide  230 entre 2,5

6. Divide  14  entre 1,6

DIVISIÓN DE UN DECIMAL ENTRE OTRO DECIMAL.

7. Divide  4,75 entre 1,9

8. Divide  9,683 entre 2,3
Dividir un Decimal por 10; 100; 1000 ...

Para dividir un número por la unidad seguida de ceros, se desplaza la coma decimal hacia la IZQUIERDA tantos lugares como ceros acompañen a la unidad.
VER AQUÍ cómo se divide. Es FÁCIL   

Más Ejemplos:    Efectuar las siguientes divisiones:


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