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Regla de 3 directa - 7º

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Quiz de Regla de 3 directa para 7º grado

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Colombia

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Regla de 3 directa - 7º
 

Regla de 3 directa - 7ºOnline version

Quiz de Regla de 3 directa para 7º grado

by Jimmy Alexander López Narváez
1

Si 5 kg de arroz cuestan 15 euros, ¿cuánto cuesta 8 kg?

2

En 4 litros de pintura cubren 32 m². ¿Cuánto cubren 7 litros?

3

Un coche recorre 120 km en 2 horas. ¿Cuántos km en 5 horas?

4

Si 3 tareas en 22 minutos, ¿cuánto tardarán 6 tareas?

5

Una receta dice 2 tazas de azúcar para 8 porciones. ¿Cuántas tazas para 12 porciones?

6

Una tienda vende 4 kg de manzanas por 18 euros. ¿Cuánto cuesta 10 kg?

7

Si 10 lápices cuestan 50 céntimos, ¿cuánto cuestan 25 lápices?

8

Una receta usa 150 ml de agua para 5 porciones. ¿Cuánto agua para 2 porciones?

9

Si 7 libros cuestan 21 euros, ¿cuánto cuestan 21 libros?

10

Si 8 días de limpieza rinden para 64 tareas, ¿cuántas tareas rinde en 12 días?

Explicación

La cantidad es proporcional: 5 kg → 15 €, 1 kg → 3 €, 8 kg → 24 €.

La cobertura es por litro; 4 L→32 m², 1 L→8 m², 7 L→56 m².

Velocidad constante: 120/2=60 km/h; 60×5=300 km.

Tiempo proporcional a la cantidad de tareas: 6/3×22=44 min.

Azúcar proporcional a porciones: 2×(12/8)=3 tazas.

Precio por kg: 18/4=4.5 €/kg; 10 kg→45 €.

Precio por lápiz = 0.50/10 = 0.05 €; 25 × 0.05 = 1.25 €.

Agua por porción: 150/5=30 ml; 2 porciones→60 ml.

Precio por libro = 21/7 = 3 €; 21 libros → 63 €.

Proporcionalidad directa: 64×(12/8)=96 tareas.

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