a) \(\frac{14}{15}+\frac{3}{11}+\frac{1}{15}+\frac{3}{11}+\frac{10}{22}\)

\(=\left(\frac{14}{15}+\frac{1}{15}\right)+\left(\frac{3}{11}+\frac{3}{11}\right)+\frac{10}{22}\)

\(=1+1+\frac{10}{22}\)

\(=2+\frac{10}{22}\)

\(=\frac{27}{11}\)

b) 9,25 + 9,25 x 8 + 9,25 

= 9,25 x ( 8 + 1 + 1 )

= 9,25 x 10 

= 92,5 

3/11 + 3/11 = 6/11 chứ sao lại ra 1 được nhể?!

\(\frac{6}{11}.\frac{15}{19}+\frac{15}{19}:\frac{11}{16}=\frac{6}{11}.\frac{15}{19}+\frac{15}{19}.\frac{16}{11}=\frac{15}{19}.\left(\frac{6}{11}+\frac{16}{11}\right)=\frac{15}{19}.2=\frac{30}{19}\)

Ta co : \(\frac{6}{11}.\frac{15}{19}+\frac{15}{19}:\frac{11}{16}\)

\(=\frac{6}{11}.\frac{15}{19}+\frac{15}{19}.\frac{16}{11}\)

\(=\frac{5}{19}\left(\frac{6}{11}+\frac{16}{11}\right)\)

\(=\frac{5}{19}.\frac{22}{11}\)

\(=\frac{5}{19}.2\)

\(=\frac{10}{19}\)

\(\frac{19}{35}+\frac{15}{19}+\frac{16}{35}+\frac{23}{19}+\frac{4}{15}+\frac{11}{15}\)

\(=\left(\frac{19}{35}+\frac{16}{35}\right)+\left(\frac{15}{19}+\frac{23}{19}\right)+\left(\frac{4}{15}+\frac{11}{15}\right)\)

\(=\frac{35}{35}+\frac{38}{19}+\frac{15}{15}\)

\(=1+2+1\)

\(=4\)

\(\frac{19}{35}+\frac{15}{19}+\frac{16}{35}+\frac{23}{19}+\frac{4}{15}+\frac{11}{15}\) 

\(=\left(\frac{19}{35}+\frac{16}{35}\right)+\left(\frac{15}{19}+\frac{23}{19}\right)+\left(\frac{4}{15}+\frac{11}{15}\right)\)

\(=1+2+1\)

\(=4\)

Học tốt

<tfh

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ddug 

\(A=\frac{18}{11}+\frac{11}{13}+\frac{15}{17}+\frac{17}{15}\)

\(=1+\frac{7}{11}+1-\frac{2}{13}+1-\frac{2}{17}+1+\frac{2}{15}\)

\(=4+\frac{7}{11}+\frac{2}{15}-\frac{2}{13}-\frac{2}{17}\)

\(\frac{7}{11}>\frac{2}{11}>\frac{2}{13};\frac{2}{15}>\frac{2}{17}\Rightarrow\frac{7}{11}+\frac{2}{15}>\frac{2}{11}+\frac{2}{17}\)

\(\Rightarrow\frac{7}{11}+\frac{2}{15}-\frac{2}{13}-\frac{2}{17}>0\)

\(\Rightarrow A>4+0=4\)

Vậy A>4

=1/16

MÌNH KO CHẮC NHÉ

(1/10+-1/10)+(1/11+-1/11)+(1/12+-1/12)+(-1/13+1/13)+(-1/14+1/14)+(-1/15+1/15)+1/16

=0 + 0 +0 + 0 +0 +0 +1/16

=1/16

\(\frac{17}{14}>1\)

84/165 + X = 19/5

X = 19/5 - 84/165

X= 543/165 = 3.29

X đó là phân số hay số tự nhiên hay số thập phân

a)=(14/15+1/15)+(3/11+3/11+5/11)

=1+(3+3+5/11)

=1+1

=2

b) 9,25 + 9,25 x 8 + 9,25

=9,25*(8+1+1)

=9,25*10

=92,5

a) 14/15 + 3/11 + 1/15 + 3/11 + 10/22

= ( 14/15 + 1/15 ) + ( 3/11 + 3/11 + 10/22 )

= 1 + ( 3/11 + 3/11 + 5/11 )

= 1 + 1

=2

b) 9,25 + 9,25 x 8 + 9,25

= 9,25 x 1 + 9,25 x 8 + 9,25 x 1

= 9,25 x ( 1 + 1 + 8 )

= 9,25 x 10

= 92,5

 1)=133\18

2)=171\5

3)=9\7

4)=431\160