\(\frac{1}{7}\times3\frac{1}{11}-\frac{1}{7}\times\frac{9}{11}-\frac{1}{7}\)

\(=\frac{1}{7}\times\frac{34}{11}-\frac{1}{7}\times\frac{9}{11}-\frac{1}{7}\)

\(=\frac{1}{7}\left(\frac{34}{11}-\frac{9}{11}-\frac{11}{11}\right)\)

\(=\frac{1}{7}\times\frac{14}{11}\)

\(=\frac{2}{11}\)

\(\frac{1}{7}\)\(\times3\frac{1}{11}\)\(-\frac{1}{7}\)\(\times\frac{9}{11}\)\(-\frac{1}{7}\)

Đề bài thế này hả bạn?

sai vi cau nay phai bang 1² + 5⁵

^{ai k mk mk k lai cho nha}

Sai vì đây là phép cộng nên ko thể là ngủ đc

A=10¹¹-1/10¹²-1<1

=>A=10¹¹-1/10¹²-1<10¹¹+1.10/10¹²⁺1.10

                             =10¹¹+10/10¹²+10

                             =10(10¹⁰+1)/10(10¹¹+1)

                             =10¹⁰+1/10¹¹+1=B

=>A<B

\(B=\frac{1}{7}x\left(\frac{34}{11}-\frac{9}{11}-1\right)\)

B = \(\frac{1}{7}x\left(\frac{34-9-11}{11}\right)\)

B = \(\frac{1}{7}x\frac{14}{11}\)

B = \(\frac{2}{11}\)

A = 288 - 18x13 +567:17

A = 288 - 234 + \(\frac{567}{17}\)

A = \(\frac{1485}{17}\)

\(A=288-18\cdot13+567:17\)

\(A=288-234+567:17\)

\(A=288-234+\frac{567}{17}\) 

\(A=54+\frac{567}{17}\)

\(A=87\frac{6}{17}=\frac{1485}{17}\)

\(B=\frac{1}{7}\cdot3\frac{1}{11}-\frac{9}{11}+\frac{1}{7}\)

\(B=\frac{1}{7}\cdot\frac{34}{11}-\frac{9}{11}+\frac{1}{7}\)

\(B=\frac{34}{77}-\frac{9}{11}+\frac{1}{7}\)

\(B=\frac{-29}{77}+\frac{1}{7}\)

\(B=\frac{-18}{77}\)

=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