Quiz about Bài 2_Số_HKI

Question 1

$$\left(\frac{2}{3}\right)^3=?$$

Accepted Answer

$$\frac{8}{27}$$

Answer

$$\frac{8}{9}$$

Answer

$$\frac{4}{9}$$

Answer

$$\frac{4}{27}$$

Question 2

$$-\frac{2}{3}+\frac{4}{3}$$ = ?

Accepted Answer

$$\frac{2}{3}$$

Answer

$$2$$

Answer

$$-\frac{2}{3}$$

Answer

$$\frac{2}{6}$$

Question 3

$$\frac{3}{7}+\frac{3}{7}:\left(-\frac{3}{2}\right)-\frac{1}{2}$$

Accepted Answer

$$-\frac{5}{14}$$

Answer

$$-\frac{5}{4}$$

Answer

$$\frac{5}{14}$$

Answer

$$-\frac{14}{5}$$

Question 4

$$2\frac{1}{2}-\left(-\frac{1}{2}\right)^2+\frac{3}{4}$$

Accepted Answer

$$3$$

Answer

$$-3$$

Answer

$$-\frac{1}{3}$$

Answer

$$\frac{1}{3}$$

Question 5

$$\left(\frac{3}{8}-1,25\right):\left(\frac{3}{4}-0,25\right)^2$$

Accepted Answer

$$-\frac{7}{2}$$

Answer

$$\frac{7}{2}$$

Answer

$$\frac{2}{7}$$

Answer

$$-\frac{2}{7}$$

Question 6

$$1\frac{2}{5}:\frac{14}{15}+\left(1\frac{1}{3}-2\frac{1}{2}\right):\frac{5}{6}$$

Accepted Answer

$$\frac{3}{10}$$

Answer

$$-\frac{3}{10}$$

Answer

$$\frac{10}{3}$$

Answer

$$-\frac{10}{3}$$

Question 7

$$\frac{8}{21}-1\frac{1}{4}+\frac{3}{14}-\left(-\frac{13}{21}\right)+0,25$$

Accepted Answer

$$\frac{19}{7}$$

Answer

$$-\frac{19}{7}$$

Answer

$$\frac{7}{19}$$

Answer

$$-\frac{7}{19}$$

Question 8

$$\frac{5}{8}\cdot2\frac{2}{5}-\frac{5}{8}\cdot1\frac{1}{3}$$

Accepted Answer

$$\frac{2}{3}$$

Answer

$$-\frac{2}{3}$$

Answer

$$\frac{3}{2}$$

Answer

$$-\frac{3}{2}$$

Question 9

$$\left(\frac{4}{9}-\frac{3}{5}\right):1\frac{1}{5}\ +\left(\frac{5}{9}+\frac{1}{5}\right):1\frac{1}{5}$$

Accepted Answer

$$\frac{1}{2}$$

Answer

$$-\frac{1}{2}$$

Answer

$$-2$$

Answer

$$2$$

Question 10

$$\frac{6}{7}:\left(\frac{3}{26}-\frac{3}{13}\right)+\frac{6}{7}:\left(\frac{1}{10}-\frac{8}{5}\right)$$

Accepted Answer

-8

Answer

8

Answer

$$-\frac{1}{8}$$

Answer

$$\frac{1}{8}$$

Question 11

$$\frac{5^4\cdot20^4}{25^5\cdot4^5}$$

Accepted Answer

$$\frac{1}{100}$$

Answer

$$-\frac{1}{100}$$

Answer

$$100$$

Answer

-100

Question 12

$$\frac{4^3\cdot25^5\cdot9^3}{8^2\cdot125^3\cdot3^5}$$

Accepted Answer

15

Answer

-15

Answer

$$\frac{1}{15}$$

Answer

$$-\frac{1}{15}$$

Question 13

$$\frac{6^3+3\cdot6^2+3^3}{-13}$$

Accepted Answer

-27

Answer

27

Answer

$$\frac{1}{27}$$

Answer

$$-\frac{1}{27}$$

Question 14

$$x-\frac{3}{4}=\frac{2}{7}$$

Accepted Answer

$$x=\frac{29}{28}$$

Answer

$$x=-\frac{13}{28}$$

Answer

$$x=\frac{13}{28}$$

Answer

$$x=-\frac{29}{28}$$

Question 15

$$-\frac{3}{8}\cdot x-0,75=-1\frac{1}{2}$$

Accepted Answer

x = 2

Answer

x = -2

Answer

$$x=-\frac{1}{2}$$

Answer

$$x=\frac{1}{2}$$

Question 16

$$\left(0,25-x\right):-\frac{3}{5}=-\frac{3}{4}$$

Accepted Answer

$$x=-\frac{1}{5}$$

Answer

$$x=\frac{1}{5}$$

Answer

$$x=5$$

Answer

x = -5

Question 17

$$\frac{-3}{5}\cdot\left(4x-1,2\right)=-\frac{12}{25}$$

Accepted Answer

$$x=\frac{1}{2}$$

Answer

$$x=-\frac{1}{2}$$

Answer

$$x=2$$

Answer

$$x=-2$$

Question 18

$$A=\left(-0,75-\frac{1}{4}\right):\left(-5\right)+\frac{1}{18}-\left(-\frac{1}{6}\right):\left(-3\right)$$

Accepted Answer

$$\frac{1}{5}$$

Answer

$$\frac{14}{45}$$

Answer

$$\frac{1}{90}$$

Answer

$$-\frac{1}{10}$$

Question 19

$$B=\left(\frac{6}{25}-1,24\right):\frac{3}{7}:\left[\left(3\frac{1}{2}-3\frac{2}{3}\right):\frac{1}{14}\right]$$

Accepted Answer

1

Answer

-1

Answer

0

Answer

2

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