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Algebra Divertido: De Números a Variables

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Algebra divertida para 5º grado

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Algebra Divertido: De Números a Variables
 

Algebra Divertido: De Números a VariablesOnline version

Algebra divertida para 5º grado

by Carolina Pule
1

¿Qué representa una variable en una expresión algebraica?

2

Empareja: 3 × x = 9. ¿Qué valor de x?

3

Ordena de menor a mayor (con a=1): -2a, a, 3a, 4

4

Deslizador: ¿qué valor de 2x+5 cuando x=4?

5

Si x=2, evalúa 4x-3

6

Completa la expresión con la incógnita: 7 + __ = 12, ¿qué valor es x?

7

Actividad arrastra: coloca la expresión equivalente a 2x+0.

8

Rellena el hueco: si y = 3x y x=4, ¿y es igual a?

9

Arrastra el coeficiente correcto para la expresión 5x - ? = 15 cuando x=2.

10

¿Qué diferencia hay entre una constante y una variable?

Explicación

Las variables sustituyen valores desconocidos que pueden cambiar.

Divides ambos lados entre 3 para despejar x.

Con a=1, valores: -2, 1, 3, 4. Orden correcto.

Sustituyes x por 4: 2(4)+5=13.

4·2−3=5.

Sustrae 7 de 12: 12−7=5.

2x es la forma equivalente de la expresión sin término independiente.

Sustituye x por 4: y=3·4=12.

5x=10; 10-?=15 implica ?= -5? (se evita confusión) — usa simplificación directa: si x=2, 5x=10.

La constante tiene valor fijo; la variable representa valores que pueden variar.

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