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Desafío de operaciones: cinco números

Riddle

Played 2

About this activity

Cinco retos de operaciones básicas

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Desafío de operaciones: cinco números
 

Desafío de operaciones: cinco númerosOnline version

Cinco retos de operaciones básicas

by Anita
1

Mi valor es el resultado de sumar 2345 y 6789 y luego restar 1234.

Pistas

Calcula 2345+6789 = 9134; luego 9134−1234 = 7900.

Primero suma los dos números grandes.

Piensa en dos operaciones simples en secuencia: suma y luego resta.

2

Mi valor es el producto de 99 y 101.

Pistas

Calcula 99×101 = 99×(100+1) = 9900+99 = 9999.

Multiplica 101 por 99 aprovechando 101 = 100+1.

Observa que uno de los factores está cerca de 100.

3

Es el cociente de 9872 dividido entre 8.

Pistas

9872 ÷ 8 = 1234.

El resultado debe ser un entero sin resto.

Divide el número grande entre 8.

4

Mi valor es la suma de tres números consecutivos: 54, 55 y 56.

Pistas

La suma total es 165.

Sumalos: 54+55+56.

Identifica que son tres números consecutivos empezando por 54.

5

Mi valor es 7×7×7.

Pistas

El resultado es 343.

Calcula 7×7×7 paso a paso: 7×7=49, luego 49×7.

Es un producto repetido de un mismo factor.

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