\(\frac{8,5-8,2}{16}\)=\(\frac{0,3}{16}\)= \(\frac{3}{160}\)=0,01875

\(\frac{11,4-11}{2-13}\)=\(\frac{0,4}{-11}\)=\(\frac{-2}{55}\)

học tốt 

\(\frac{11.4-11}{2-13}=\frac{11\left(4-1\right)}{-11}=\frac{11.3}{-11}=\frac{\left(-11\right).\left(-3\right)}{-11}=-3\)

ket qua la -3

=\(\frac{44-11}{-11}\) 

=\(\frac{33}{-11}\)

=-3

\(\frac{11.4-11}{2-13}\)=\(\frac{11.\left(4-1\right)}{-11}\)=\(\frac{-1.3}{1}\)=\(\frac{-3}{1}\)=-3

\(\frac{11.4-11}{2-13}=\frac{11.\left(4-1\right)}{-11}=\frac{11.3}{-11}=-3\)

\(\frac{11.4-11}{2-13}=\frac{44-11}{-11}\frac{33}{-11}=\frac{-3}{1}=-3\)

\(\frac{11.4-11}{2-13}=\frac{11.\left(4-1\right)}{-11}=\frac{11.3}{-11}=\frac{33}{-11}=-3\)

Vậy kết quả của biểu thức = 3 là sai

Phải thành -3 mới đúng!

Chúc em học tốt!

*Rút gọn :

`(8.5-8.2)/16=(8.(5-2))/(8.2)=(8.3)/(8.2)=3/2`

`(11.4-11)/(2-13)=(11.(4-1))/(-11)=(11.3)/(-1.11)=3/(-1)=-3`

*Quy đồng :

- Ta có : `-3=(-3)/1`

UCLN(2,1)=2

$\to\begin{cases} \dfrac32=\dfrac32\\\dfrac{-3}1=\dfrac{-6}2\end{cases}$

\(\frac{11.4-11}{2-13}\)

\(=\frac{11\left(4-1\right)}{-11}\)

\(=\frac{3}{-1}\)

\(=-3\)

11.4-11/2-13= -3

Ta có: \(\dfrac{8.5-8.2}{16}=\dfrac{8\left(5-2\right)}{16}=\dfrac{8.3}{16}=\dfrac{3}{2}\) 

           \(\dfrac{11.4-11}{2-13}=\dfrac{11\left(4-1\right)}{-11}=\dfrac{11.3}{-11}=-3\)