Ta có 

kết quả

là:

1819128221

nha bn

Tính hợp lí :\(\left(\frac{112}{13.20}+\frac{112}{20.27}+\frac{112}{27.34}+...+\frac{112}{62.69}\right):\left(-\frac{5}{9.13}-\frac{7}{9.25}-\frac{13}{19.25}-\frac{31}{16.69}\right)\)

@No choice teen,@Băng Băng 2k6,@Vũ Minh Tuấn

\(132.9+132=132.\left(9+1\right)=132.10=1320.\)

\(48.17+48.3=48.\left(17+3\right)=48.20=960\)

\(45.48-90.24+145=45.48-45.2.24+145=45.\left(48-2.24\right)+145\)=45.0+145=145