\(a,51+6-1-0,2=55,8\)

\(b,2511\times-24,8-2511\times75,2\)

\(=-24,8\times75,2=-100\)

\(=-251100\)

a, 51+6-1-0,2 

=57-1;2

=55.8 

b, 2511. -24,8 -2511.75,2

=2511.(-24,8 -75,2)

=2511.-100

=-251100

a ) 51 + 6 - 1 - 0,2

  =   57 - 1 - 0,2

  =  56 - 0,2

  = 66,8

b ) 2511 x - 24,8 - 2511 x 75,2

   =  2511 x ( -24,8 - 75,2 )

   =  2511 x -100

   = -251100

\(\frac{11}{25}\)\(\left(-24,8\right)-\frac{11.}{25}\)\(x75,2\)

\(\frac{11}{25}\)\(\left[\left(-24,8\right)-75,2\right]=\frac{11}{25}\)\(x\left(-100\right)=-44\)

5) \(\left(-2\right)^2+\sqrt{36}-\sqrt{9}+\sqrt{25}\)

=\(4+6-3+5\)

=\(12\)

2) \(\dfrac{11}{25}.\left(-24,8\right)-\dfrac{11}{25}.75,2\)

=\(\dfrac{11}{25}.\left(-24,8-75,2\right)\)

=\(\dfrac{11}{25}.\left(-100\right)\)

=\(-44\)

\(6\)) \(\left(-\dfrac{1}{3}\right)^2\).\(\dfrac{4}{11}+\dfrac{7}{11}.\left(-\dfrac{1}{3}\right)^2\)

=\(\left(-\dfrac{1}{3}\right)^2.\left(\dfrac{4}{11}+\dfrac{7}{11}\right)\)

=\(\left(-\dfrac{1}{3}\right)^2.1\)

=\(\dfrac{1}{9}\)

9.18x(75.2+24.8)

=9.18x100

=918

9,18 x 75,2 + 24,8 x 9,18 = 9,18 x ( 75,2 + 24,8) =918

9,18 x 75,2 + 24,8 x 9,18=9,18x(75,2+24,8)

=9,18x100=918

=

=>x=3,84

Vậy x =3,84

\(x\div0,125+x\div20\%-x\div25\%+x+36,8=75,2\)

\(10x+36,8=75,2\)

\(10x=75,2-36,8\)

\(10x=38,4\)

   \(x=38,4\div10\)

   \(x=3,84\)

x÷0,125+x÷20−x÷25%+x+36,8=75,210x+36,8=75,210x=75,2−36,810x=38,4x=38,4÷10

x=3,84

\(=\dfrac{13}{25}\cdot\dfrac{11}{6}\cdot\dfrac{25}{12}\cdot\dfrac{11}{6}=\dfrac{121}{36}\cdot\dfrac{13}{12}=\dfrac{1573}{432}\)

\(\frac{5}{11}+\frac{1}{14}+\frac{2}{5}+\frac{6}{11}+\frac{3}{4}+\frac{6}{25}+\frac{9}{25}\)

\(=\frac{5}{11}+\frac{6}{11}+\frac{1}{14}+\frac{3}{4}+\frac{2}{5}+\frac{6}{25}+\frac{9}{25}\)

\(=1+\frac{23}{28}+1\)

\(=\frac{79}{28}\)

Bạn có thể xem ở đây : Tại đây

=1/14 +1/4+(2/5+6/25+9/25)+(6/11+5/11)

=4/64+16/64+1+1

=20/64+1+1

=5/16+1+1

=2 và 5/16

\(\frac{5}{11}+\frac{1}{14}+\frac{2}{5}+\frac{6}{11}+\frac{3}{4}+\frac{6}{25}+\frac{9}{25}\)

\(=\left(\frac{5}{11}+\frac{6}{11}\right)+\left(\frac{1}{14}+\frac{3}{4}\right)+\left(\frac{6}{25}+\frac{9}{25}\right)+\frac{2}{5}\)

\(=1+\frac{23}{28}+\frac{3}{5}+\frac{2}{5}\)

\(=1+\frac{23}{28}+1\)

\(=2+\frac{23}{28}\)

\(=\frac{79}{28}\)

Ai k mik mik k lại

\(\frac{79}{28}\)nha bạn

Cho mình sửa lại đề tí nhé bạn , nếu có gì sai liên hệ với mình !

\(\frac{5}{11}+\frac{1}{4}+\frac{2}{5}+\frac{6}{11}+\frac{3}{4}+\frac{6}{25}+\frac{9}{25}\)

\(=\frac{5}{11}+\frac{6}{11}+\frac{1}{4}+\frac{3}{4}+\frac{2}{5}+\frac{6}{25}+\frac{9}{25}\)

\(=1+1+1\)

\(=3\)

\(\frac{79}{28}\)nha bạn