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Matemáticas 1º ESO PDA 2022

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Quiz de conceptos clave

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Mexico

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Matemáticas 1º ESO PDA 2022
 

Matemáticas 1º ESO PDA 2022Online version

Quiz de conceptos clave

by Margarita Morales
1

¿Cuánto es 3/4 + 2/3?

2

¿Cuánto es 3/4 + 2/3?

3

¿Cuánto es 3/4 + 2/3?

4

¿Cuánto es 3/4 + 2/3?

5

¿Cuánto es 3/4 + 2/3?

6

Expresión simplificada: 2x + 3x = ?

7

Expresión simplificada: 2x + 3x = ?

Escoge una o varias respuestas

8

Si 5a = 20, ¿cuánto vale a?

9

Perímetro de un rectángulo de 7 cm por 3 cm es...

10

Área de un cuadrado de lado 5 cm es...

11

Factoriza 6y^2 - 9y.

12

En una proporción 3 es a 12 como x es a 48, ¿valor de x?

13

Conversión: 0.75 equivale a...

14

Resuelve 2x - 3 = 7, ¿cuál es x?

15

Área de un triángulo con base 8 cm y altura 5 cm es...

Explicación

La suma de fracciones requiere un denominador común (12). 17/12 es la suma correcta.

La suma de fracciones requiere un denominador común (12). 17/12 es la suma correcta.

La suma de fracciones requiere un denominador común (12). 17/12 es la suma correcta.

La suma de fracciones requiere un denominador común (12). 17/12 es la suma correcta.

La suma de fracciones requiere un denominador común (12). 17/12 es la suma correcta.

Se suman términos semejantes (2x+3x) dando 5x.

Se suman términos semejantes (2x+3x) dando 5x.

Divide ambos lados entre 5: a = 20/5 = 4.

Perímetro = 2*(largo+ancho) = 2*(7+3) = 20 cm.

Área = lado^2 = 5^2 = 25 cm².

Factoriza comúnmente: 3y(2y - 3).

Cruce de productos: 3/12 = x/48 → x = 16.

0.75 = 75/100 = 3/4 simplificado.

2x = 10 → x = 5.

Área = (base*altura)/2 = 8*5/2 = 20 cm².

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