Đề thi Giữa kì 2 Toán 8 (Đề 2)

$\dfrac{5xy-7}{y^2}$

$5xy^2-2$

$\dfrac{x^2-2x+4}{3x-1}.$

$\dfrac{2x^2-x+1}{\dfrac{1}{x-y}}.$

$3x$

$4x^2$

$5x^2$

$2x^3$

$\dfrac{3}{x-1}$

$\dfrac{x+1}{3}$

$-\dfrac{3}{x+1}$

$\dfrac{-3}{-x-1}$

$\dfrac{x+y}{2x}$

$-\dfrac{2\left(x+y\right)}{x}$

$-\dfrac{x+y}{2x}$

$-\dfrac{2x}{x+y}$

$\dfrac{2}{x}-3=0.$

$\dfrac{-1}{2}x+2=0.$

$x+y=0.$

$0x+1=0$

$-2$

$-6$

$2$

$6$

$\widehat{B}=\widehat{E}.$

$\widehat{C}=\widehat{F}.$

$\widehat{B}+\widehat{C}=\widehat{E}+\widehat{F}.$

$\widehat{B}-\widehat{C}=\widehat{E}-\widehat{F}.$

$10\sqrt{2}\text{cm}.$

$10\text{cm}.$

$5\sqrt{2}\text{cm}.$

$5\text{cm}.$