
EXAMEN DE DIAGNOSTICO
Authored by sandra herrera
Mathematics
9th Grade

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10 questions
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1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
¿Cuál es el resultado de la siguiente operación?
-5 + 3 − (−2) =
¿Cuál es el resultado de la siguiente operación?
-5 + 3 − (−2) =
-10
0
-4
-6
Answer explanation
La operación −5+3−(−2) se resuelve aplicando la regla de los signos: restar un número negativo equivale a sumarlo, por lo tanto, −(−2) se convierte en +2. Así, la expresión queda como −5+3+2. Primero, sumamos −5+5, lo que da como resultado 0. Por eso, la respuesta correcta es la opción D.
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
-16
8
16
-8
Answer explanation
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Los términos de la radicación son:
índice, raíz y radicando
radical, índice, raíz
radical, índice, raíz y radicando
radical, raíz y radicando
Answer explanation
Recuerda los términos o partes de la radicación estudiados en clase.
4.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
¿3/4 es un número racional?
verdadero
falso
Answer explanation
5.
FILL IN THE BLANK QUESTION
1 min • 1 pt
La aproximación del número 7,856 redondeado a la centésima es:
Answer explanation
el número 7,856 Para aproximar a las centésimas le miramos al número 6 como es mayor que 5 se suma en 1 al numero 5 y nos queda 7,86
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
6
5
8
4
Answer explanation
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
¿Cuál es el área de un rectángulo que mide 8 cm de largo y 5 cm de ancho?
40 cm
13 cm
Answer explanation
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