Bài 2:
a: \(1.25+0.37-5.12=-3.5\)
b: \(\left(-2.98\right)-\left(-3.49\right)+\left(-2.54\right)=-2.03\)
\(1,\left|1\dfrac{1}{3}\right|=\dfrac{4}{3};\left|-2,5\right|=2,5;\left|-0,7\right|=0,7;\left|-1\dfrac{2}{5}\right|=\dfrac{7}{5}\\ 2,\\ a,=-3.5\\ b,=-2,03\\ 3,\\ a,\Rightarrow\left[{}\begin{matrix}x=\dfrac{3}{2}\\x=-\dfrac{3}{2}\end{matrix}\right.\\ b,\Rightarrow\left|x\right|=\dfrac{1}{3}+\dfrac{1}{2}=\dfrac{5}{6}\Rightarrow\left[{}\begin{matrix}x=\dfrac{5}{6}\\x=-\dfrac{5}{6}\end{matrix}\right.\\ c,\Rightarrow\left|x+1\right|=\dfrac{3}{2}:2=\dfrac{3}{4}\\ \Rightarrow\left[{}\begin{matrix}x+1=\dfrac{3}{4}\left(x\ge-1\right)\\x+1=-\dfrac{3}{4}\left(x< -1\right)\end{matrix}\right.\Rightarrow\left[{}\begin{matrix}x=-\dfrac{1}{4}\left(tm\right)\\x=-\dfrac{7}{4}\left(tm\right)\end{matrix}\right.\)
vẽ hình giúp e ạ có gì giải ra ạ em cảm ơn ạ=))
