sau 

has nhé

have just received

\(.\)là \(\times\)nhé

\(\dfrac{5}{8}\)\(.\)\(\dfrac{11}{25}\)\(+\)\(\dfrac{14}{25}\)\(.\)\(\dfrac{5}{8}\)

\(=\)\(\dfrac{5}{8}\)\(.\)\(\left(\dfrac{11}{25}+\dfrac{14}{25}\right)\)

\(=\)\(\dfrac{5}{8}.\)\(\dfrac{25}{25}\)

\(=\dfrac{5}{8}.\)\(1\)\(=\dfrac{5}{8}\)

\(53.\left(51+4\right)\)\(+53.\)\(\left(49+91\right)\)\(+53\)

\(=\)\(53.\left(51.4\right)\)\(+53.\)\(\left(49+91\right)\)\(+53.1\)

\(=\)\(53.55+53.140+1\)

\(=\)\(53.\left(55+140+1\right)\)

\(=\)\(10388\)

\(\dfrac{2}{1}\)

\(lot\)

(a lot of):nhiều,rất nhiều.

đề bài là j vậy bn?

\(5\)