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Desafío de la Regla de Tres

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Desafío de la Regla de Tres

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About this activity

Pruebas rápidas de proporciones

Created by

Leanny Quevedo Frías
Leanny Quevedo Frías
Dominican Republic

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Desafío de la Regla de Tres
 

Desafío de la Regla de TresOnline version

Pruebas rápidas de proporciones

by Leanny Quevedo Frías
1

Si 5 manzanas cuestan 10 €, ¿cuánto cuestan 8 manzanas?

2

Si 3 cuadernos cuestan 9€, ¿cuánto cuestan 7 cuadernos?

3

Si 6 horas de trabajo 2 personas pueden hacer 36 unidades, ¿cuántas unidades harán 3 personas en 6 horas?

4

Si 10 kg de alimento para 4 perros duran 40 días, ¿cuántos días durarán 6 perros con 10 kg?

5

Si se recorren 20 km en 2 h, ¿cuántas horas se tardarán 50 km?

6

Si 100 kg de tomates producen 200 litros de salsa, ¿cuántos litros salen con 250 kg?

7

Si 20 kg de una mercancía cuestan 80 €, ¿cuánto cuestan 5 kg?

8

Si 9 empleados producen 45 unidades en 3 horas, ¿cuántas unidades producirán en 5 horas con 9 empleados?

9

Si 15 litros de pintura cubren 150 m2, ¿cuántos m2 cubre 9 litros?

10

Si 7 libros cuestan 21€ al abrir oferta, ¿cuánto cuesta 11 libros?

Explicación

La regla de tres directa: 10/5 = 2€ por manzana; 8×2 = 16€.

Precio por cuaderno = 9/3 = 3€. 7×3 = 21€.

Unidades ∝ personas×horas. 2×6 =12 p-h producen 36; 3×6 =18 p-h producen 36×(18/12)=54.

Días ≈ 40×(4/6) = 26,7 días. Más perros con la misma cantidad dura menos.

Tiempo = (2 h)×(50/20) = 5 h.

Proporción directa: 200×(250/100) = 500 L.

Precio por kg = 80/20 = 4€. 5 kg → 5×4 = 20€.

Producción ∝ horas. 45×(5/3) = 75 unidades.

Rendimiento 150/15 = 10 m2 por litro; 9 L → 90 m2.

Precio por libro = 21/7 = 3€. 11×3 = 33€.

 
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