a,b,c,d,e = 0

g = 3/10

máy tính xin hân hạnh đồng hành cùng với lê Kiều Trinh

\(a,1,\left(27\right)=1+\frac{27}{99}=1+\frac{3}{11}=\frac{14}{11}\)

\(0,\left(423\right)=\frac{423}{999}=\frac{47}{111}\)

\(2,\left(15\right)=2+\frac{15}{99}=2+\frac{5}{33}=\frac{71}{33}\)

\(b,3,04\left(31\right)=3+\frac{431-4}{9990}=3+\frac{427}{9990}=\frac{3397}{9990}\)

\(1,8\left(34\right)=1+\frac{834-8}{990}=1+\frac{413}{495}=\frac{908}{495}\)

Bài 1:

\(0,0\left(8\right)=\frac{1}{10}\cdot0,\left(8\right)=\frac{1}{10}\cdot0,\left(1\right)\cdot8=\frac{4}{5}\cdot\frac{1}{9}=\frac{4}{45}\)

\(0,1\left(2\right)=0,1+0,0\left(2\right)=\frac{1}{10}+\frac{1}{10}\cdot0,\left(2\right)=\frac{1}{10}+\frac{1}{10}\cdot0,\left(1\right)\cdot2=\frac{1}{10}+\frac{1}{5}\cdot\frac{1}{9}=\frac{1}{10}+\frac{1}{45}=\frac{11}{90}\)

\(0,1\left(23\right)=0,1+0,\left(23\right)=\frac{1}{10}+0,\left(01\right)\cdot23=\frac{1}{10}+\frac{1}{99}\cdot23=\frac{1}{10}+\frac{23}{99}=\frac{329}{990}\)

0,(1) =\(\frac{1}{9}\); 0,0(33) = 0,(01).33 : 10 =\(\frac{33}{99}:10=\frac{1}{30}\);

8,2(7) = 82,(7) : 10 =\(\frac{82+0,\left(1\right).7}{10}=\frac{82+\frac{7}{9}}{10}=\frac{745}{9}:10=\frac{149}{18}\)

1,00(001) = 100,(001) : 100 =\(\frac{100+\frac{1}{999}}{10}=\frac{99901}{999}:10=\frac{99901}{9990}\)

a)  5 − 29 = − 5 29

b)  31 − 33 = − 31 33

1.         \(\frac{4}{4};\frac{4}{9};\frac{4}{15}\)

2.         \(\frac{6767}{8484}=\frac{6767\div101}{8484\div101}=\frac{67}{84}\)

Đoạn sau ko có máy  tính ko tính được.

làm ơn giúp mình đi please

giúp mình với , càng nhanh càng tốt

a: \(\dfrac{7}{3}=2,\left(3\right)\)

\(\dfrac{7}{9}=0,\left(7\right)\)

\(\dfrac{4}{9}=0,\left(4\right)\)

\(\dfrac{13}{45}=0,2\left(8\right)\)

b: \(-\dfrac{1}{3}=-0.\left(3\right)\)

\(\dfrac{4}{7}=0,\left(571428\right)\)

a)

b)

1D

2: Ko có câu nào đúng

3: A

4: D

5C