\(2\frac{2}{5}\) x \(\frac{25}{18}\) = \(\frac{12}{5}x\frac{25}{18}=\frac{10}{3}\)                  x = nhân

\(\frac{9}{11}:2\frac{5}{2}x2\frac{3}{4}\) = \(\frac{9}{11}:\frac{9}{2}x\frac{11}{4}=\frac{2}{11}x\frac{11}{4}=\frac{1}{2}\)

\(10:\frac{35}{24}:\frac{36}{7}=\frac{48}{7}:\frac{36}{7}=\frac{4}{3}\)

\(10,77x9,8+5,23x9,8=\left(10,77+5,23\right)x9,8=156,8\)

\(1,26x3,6:0,28-6,2=4,536:0,28-6,2=16,2-6,2=10\)

bạn nói rõ hơn đi

c,10 : 35/24 : 36/7

=10 x 24/35 x 7/36

=10 x (24/35 x 7/36)

=10 x 2/15

=4/3

d,10,77 x 9,8 + 5,23 x 9,8

=9,8 x (10,77+5,23)

=9.8 x 16

=156,8

e,1,26 x 3,6 : 0,28 - 6,2

=4,536 : 0,26 - 6,2

=16,2 - 6,2

=10

a: =105,546+23,535=129,081

b: =16,2-6,2=10

c: =[10,5-5,5]:2,5

=5:2,5=2

đéo biết

\(\frac{22}{5}x\frac{25}{18}=\frac{550}{90}=\frac{55}{9}\)

\(\frac{9}{11}:2\frac{5}{2}x2\frac{3}{4}=\frac{9}{11}:\frac{9}{2}x\frac{11}{4}=\frac{9}{11}x\frac{2}{9}x\frac{11}{4}=\frac{1}{2}\)

\(10:\frac{35}{24}:\frac{36}{7}=10x\frac{24}{35}x\frac{7}{26}=\frac{10}{1}x\frac{24}{35}x\frac{7}{26}=\frac{24}{13}\)

   10,77 x 9,8 + 5,23 x 9,8 

= (10,77 + 5,23) x 9,8 = 16 x 9,8 = 156,8

1,26 x 3,6 : 0,28 - 6,2 = 4,536 : 0,28 - 6,2=

16,2 - 6,2 = 10

20/11 x 33/23 x 69/180 =

1/1 x 3/1 x 3/9 =

3/1 x 1/3 = 1

(Câu cuối trong fx không có phần gạch giữa {S} nên mình ghi tạm ngoài này nha bạn!)

a: \(=-\dfrac{5}{12}\cdot\dfrac{9}{20}\cdot\dfrac{7}{17}=-\dfrac{21}{272}\)

b: \(=\dfrac{13}{17}\left(-\dfrac{4}{5}-\dfrac{3}{4}\right)=\dfrac{-13}{17}\cdot\dfrac{31}{20}=-\dfrac{403}{340}\)

c: \(=\dfrac{-5}{7}\left(\dfrac{2}{11}+\dfrac{9}{11}\right)+\dfrac{5}{7}=-\dfrac{5}{7}+\dfrac{5}{7}=0\)

d: \(=\dfrac{12}{5}-\dfrac{3}{10}=\dfrac{21}{10}\)

b: =>x/23=1+3/4+4/7=65/28

=>x=23*65/28=1495/28

c: =>3/5:x=3/5-1/4-1/2=9/40

=>x=3/5:9/40=8/3