Bài 3:
\(1)2,\left(4\right)=2,444...=2,44\\ 2)0,\left(7\right)=0,777...=0,78\\ 3)5,\left(9\right)=5,999...=6\\ 4)3,\left(5\right)=3,555...=3,56\\ 5)-4,\left(2\right)=-4,222...=-4,22\\ 6)-5,\left(6\right)=-5,666...=-5,67\\ 7)-0,\left(8\right)=-0,888...=-0,89\\ 8)-1,\left(5\right)=-1,555...=-1,56\)
Bài 4:
\(1)0,\left(35\right)=0,3535...=0,35\\ 2)1,\left(97\right)=1,9797...=1,98\\ 3)3,\left(45\right)=3,4545...=3,45\\ 4)4,\left(29\right)=4,2929...=4,29\\ 5)-9,\left(13\right)=-9,1313...=-9,13\\ 6)-0,\left(19\right)=-0,1919...=-0,19\\ 7)-3,\left(78\right)=-3,7878...=-3,79\\ 8)-9,\left(50\right)=-9,5050...=-9,51\)
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