Question

Tính giá trị biểu thức:

A= (2 1/5 - 3/5) : 16/18 : 9/10

B= (1 1/20  + 36/100) : 84/25 : (2+14/16

C= (-1 2/3 + 3/4). 50% : 0,16

A= -1,8. (15% - 1 3/20) : 0,1

1,4. 15/49 - (4/5 + 2/3) : 2 1/5

(-1/2)³   : 1 3/8 - 25% (-6 2/11)

75% - (1,25 - 2 3/4)³   : 3²/2

1/9 + 8/9 : (7,875 - 8 3/8)

 

Em ko biết viết mã TeX :(

Answer 1

\(A=\left(\frac{21}{5}-\frac{3}{5}\right):\frac{16}{8}:\frac{9}{10}\)

\(A=\frac{18}{5}:\frac{16}{8}:\frac{9}{10}\)

\(A=\frac{18}{5}\times\frac{8}{16}\times\frac{10}{9}\)

\(A=\frac{9}{5}\times\frac{8}{8}\times\frac{10}{9}\)

\(A=\frac{72}{40}\times\frac{10}{9}\)

\(A=\frac{8}{4}\times\frac{1}{1}\)

\(A=\frac{8}{9}\)

Answer 2

\(B=\left(1\frac{1}{20}+\frac{36}{100}\right):\frac{84}{25}:\left(2+\frac{14}{16}\right)\)

\(B=\left(\frac{21}{20}+\frac{36}{100}\right):\frac{84}{25}:\left(\frac{32}{16}+\frac{14}{16}\right)\)

\(B=\left(\frac{105}{100}+\frac{36}{100}\right):\frac{84}{25}:\frac{46}{16}\)

\(B=\frac{141}{100}:\frac{84}{25}:\frac{46}{16}\)

\(B=\frac{141}{100}\times\frac{25}{84}\times\frac{16}{46}\)

\(B=\frac{141}{4}\times\frac{1}{84}\times\frac{16}{46}\)

\(B=\frac{141}{336}\times\frac{16}{46}\)

\(B=\frac{141}{21}\times\frac{1}{46}\)

\(B=\frac{141}{966}\)