\(120:\left\{54-\left[50:2-\left(32-2,4\right)\right]\right\}\)

\(=120:\left[54-\left(25-29,6\right)\right]\)

\(=120:\left[54-\left(-4,6\right)\right]\)

\(=120:58,6\)

\(=\dfrac{600}{293}\)

đề lỗi hay bạn lỗi hả chứ kết quả cũng ra đc nhưng mà nó lạ lắm bạn kiểm tra lại câu hỏi chưa vậy

TL :

120 : 54 - [ 50 : 2 - 3² - 2 x 4 ]

120 : 54 - [ 50 : 2 - 9 - 8 ]

120 : 54 - [ 25 - 1 ]

120 : 54 - 24

120 : 30

4

\(B=-11,2+1,456.\frac{25}{7}-\frac{9}{2}.40\%=-7,8\)

Tích cho mk nha!

-11,2 + 1,456 . 25/7 - 9/2 . 40%

= -11,2 + 26/5 - 9/2 . 4/10

= -11,2 + 26/5 - 9/5

= -6 - 9/5

= 39/5 = 7,8

c) 3⁴ - 5.42

= 81 - 210

= -129

d) 120 : {54 - [50 : 2 - (3² - 2.4)]}

= 120 : {54 - [25 - (9 - 8)]}

= 120 : [54 - (25 - 1)]

= 120 : (54 - 24)

= 120 : 30

= 4

f, \(\dfrac{165}{270}\) = \(\dfrac{165:15}{270:15}\) = \(\dfrac{11}{18}\) = \(\dfrac{11\times6}{18\times6}\) = \(\dfrac{66}{108}\)

 \(\dfrac{91}{156}\) = \(\dfrac{91:13}{156:13}\) = \(\dfrac{7}{12}\) = \(\dfrac{7\times9}{12\times9}\) = \(\dfrac{63}{108}\)

\(\dfrac{210}{1134}\) = \(\dfrac{210:42}{1134:42}\) = \(\dfrac{5}{27}\) =  \(\dfrac{5\times4}{27\times4}\) = \(\dfrac{20}{108}\)

g, \(\dfrac{21}{9}\) = \(\dfrac{21:3}{9:3}\) = \(\dfrac{7}{3}\) = \(\dfrac{7\times10}{3\times10}\) = \(\dfrac{70}{30}\)

     \(\dfrac{120}{50}\) =  \(\dfrac{120:10}{50:10}\) = \(\dfrac{12}{5}\) = \(\dfrac{12\times6}{5\times6}\) = \(\dfrac{72}{30}\)

       \(\dfrac{63}{54}\) = \(\dfrac{63:9}{54:9}\) = \(\dfrac{7}{6}\)  = \(\dfrac{7\times5}{6\times5}\) = \(\dfrac{35}{30}\)

h, \(\dfrac{75}{100}\) = \(\dfrac{75:25}{100:4}\) = \(\dfrac{3}{4}\) = \(\dfrac{3\times9}{4\times6}\) = \(\dfrac{27}{36}\)

      \(\dfrac{150}{90}\) = \(\dfrac{150:30}{90:30}\) =  \(\dfrac{5}{3}\) = \(\dfrac{5\times12}{3\times12}\) = \(\dfrac{60}{36}\)

       \(\dfrac{250}{900}\) = \(\dfrac{250:50}{900:50}\) = \(\dfrac{5}{18}\)  = \(\dfrac{5\times2}{18\times2}\) = \(\dfrac{10}{36}\)

120/{54-[50/2-(3^2-2*4)]}

120/{54-[50/2-(9-8)]}

120/{54-[25-1]}

120/{54-24}

120/30

4

Chịu ai mà biết

c: \(=160:\left\{120-\left[24+4^2\right]\right\}\)

\(=160:80\)

=2