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![](https://rs.olm.vn/images/avt/0.png?1311)
\(4\frac{2}{10}m=\frac{42}{10}m\)
\(3\frac{12}{100}m=\frac{312}{100}m\)
\(2\frac{2}{25}kg=2\frac{8}{100}kg=\frac{208}{100}kg\)
\(4\frac{2}{10}m=4,2m\)
\(3\frac{12}{100}m=3,12m\)
\(2\frac{2}{25}kg=2,08kg\)
![](https://rs.olm.vn/images/avt/0.png?1311)
\(\frac{1}{4}\)
\(=\frac{1\times25}{4\times25}\)
\(=\frac{25}{100}\)
\(=25:100\)
\(=0,25\)
![](https://rs.olm.vn/images/avt/0.png?1311)
\(A=\frac{1}{2}+\frac{1}{4}+\frac{1}{6}+\frac{1}{8}+\frac{1}{10}+\frac{1}{12}+\frac{1}{14}+\frac{1}{16}+\frac{1}{18}+\frac{1}{20}\)
\(A=1,46\)
![](https://rs.olm.vn/images/avt/0.png?1311)
a ) 0,7 = 7/10
0,94 = 94/100
2/7 = 27/10
4,567 = 4567/1000
b ) 1/4 = 25/100
7/5 = 14/10
16/25 = 64/100
3/2 = 15/10
Bài làm :
a)
0,7 = \(\frac{7}{10}\)
0,94 = \(\frac{94}{100}\)
2,7 = \(\frac{27}{10}\)
4,567 = \(\frac{4567}{1000}\)
b)
1/4 = 25/100 .
7/5 = 14/10 .
16/25 = 64/100 .
3/2 = 15/10 .
![](https://rs.olm.vn/images/avt/0.png?1311)
\(8\frac{3}{5}=8,6\)
\(4\frac{13}{25}=4,52\)
\(1\frac{15}{20}=1,75\)
\(18\frac{3}{4}=18,75\)
\(8\frac{3}{5}=3,8\)
\(4\frac{13}{25}=1,08\)
\(1\frac{15}{20}=-0,25\)
\(18\frac{3}{4}=3,375\)
P/s: Mik ko chác
C1/250