PRUEBA NATURALES Y ENTEROS
Quiz
•
Mathematics
•
12th Grade
•
Hard
Used 4+ times
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27 questions
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1.
MULTIPLE CHOICE QUESTION
3 mins • 5 pts
A las 8 de la mañana, los termómetros registran una temperatura de -7ºC. A las 3 de la tarde, la temperatura ha llegado hasta los 4ºC. ¿Cuál ha sido la variación de temperatura entre esos dos momentos?
+3ºC
-3ºC
+11ºC
-11ºC
Answer explanation
La variación es la resta de la temperatura final (4ºC) menos la temperatura inicial (-7ºC).
4 - (-7) = +11 ºC
2.
MULTIPLE CHOICE QUESTION
3 mins • 5 pts
Calcula:
|Op (-3)| =
+3
-3
No hay
Las dos son válidas.
Answer explanation
El opuesto de -3 es 3.
Y e valor absoluto de 3 es 3.
3.
MULTIPLE CHOICE QUESTION
3 mins • 5 pts
-28
-22
-12
-18
Answer explanation
Jerarquía de operaciones:
Primero la multiplicación:
-20
Luego la resta:
-2-20=-22
4.
MULTIPLE CHOICE QUESTION
3 mins • 5 pts
-14
10
-20
-10
Answer explanation
Jerarquía de operaciones:
Primero el corchete:
4 + 1 = 5
Luego la multiplicación:
-3 · (- 5) = 15
Por último, se resta:
-5 - 15 = -20
5.
MULTIPLE CHOICE QUESTION
3 mins • 5 pts
Un coche pasa de circular a 15 km/h por debajo del límite de velocidad a hacerlo a 5 km/h más rápido que la velocidad permitida. ¿Cuál de estas operaciones con números enteros nos daría el cambio de velocidad de ese coche?
(+5) - (-15)
(-15) - (+5)
(+15) - (-5)
(-5) - (+15)
6.
MULTIPLE CHOICE QUESTION
3 mins • 5 pts
Expresa 456 000 000 en notación científica.
Answer explanation
La notación científica sólo tiene una cifra antes de la coma distinta de cero.
7.
MULTIPLE CHOICE QUESTION
3 mins • 10 pts
Calcula el mínimo común múltiplo de 75 y 100.
100
150
300
600
Answer explanation
Comunes y no comunes al mayor exponente
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