Calculo mental

Calculo mental

9th Grade

14 Qs

quiz-placeholder

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Calculo mental

Calculo mental

Assessment

Quiz

Mathematics

9th Grade

Practice Problem

Hard

Created by

EST 113 Vazquez Fajardo Ruben

Used 46+ times

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14 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

20 sec • 1 pt

Resuelve la siguiente operación:

 23 ×67=\frac{2}{3}\ \times\frac{6}{7}=  

 2244\frac{22}{44}  

 47\frac{4}{7}  

 612\frac{6}{12}  

 36\frac{3}{6}  

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

¿Cuál será el perímetro de un cuadrado que tiene por área

 81 cm281\ cm^2  

81 cm

 36 cm236\ cm^2   

 81 cm281\ cm^2  

36 cm

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

¿Cuál es la probabilidad de que al lanzar un dado la cara que caiga hacia arriba sea 5?

23\frac{2}{3}

19\frac{1}{9}

15\frac{1}{5}

16\frac{1}{6}

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Resultado de: -5 (7) +  306\frac{30}{6}  =

-30

30

 57\frac{-5}{7}  

 15\frac{1}{5}  

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Resultado de  (2a +7b)2\left(2a\ +7b\right)^2  

 4b2 +28ab + 49a24b^2\ +28ab\ +\ 49a^2  

 4ab2 + 28a2 + 49b24ab^2\ +\ 28a^2\ +\ 49b^2  

 4a2 +28ab + 49b24a^2\ +28ab\ +\ 49b^2  

 4ab2 28a2  49b2-4ab^2\ -28a^2\ -\ 49b^2  

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Dos proposiciones o eventos son mutuamente excluyentes o disjuntos si ambos no pueden ser verdaderos o ...

suceder al mismo tiempo

si no suceden

si no suceden igual al mismo tiempo

ninguna de las anteriores

7.

MULTIPLE CHOICE QUESTION

45 sec • 1 pt

El resultado del binomio con un término común (x-3) (x+7) es:

x2+4x+21x^2+4x+21

x2+4x21x^2+4x-21

x24x21x^2-4x-21

x24x+21x^2-4x+21

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