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a)
\(3:8=\dfrac{3}{8}\)
\(8:9=\dfrac{8}{9}\)
\(4:7=\dfrac{4}{7}\)
\(12:5=\dfrac{12}{5}\)
b)
\(7=\dfrac{7}{1}\)
\(9=\dfrac{9}{1}\)
\(21=\dfrac{21}{1}\)
\(40=\dfrac{40}{1}\)
![](https://rs.olm.vn/images/avt/0.png?1311)
1.
a) 10=\(\dfrac{40}{4}\)
b) 25= \(\dfrac{100}{4}\)
2.
a) 11=\(\dfrac{11}{1}\)
b) 276=\(\dfrac{276}{1}\)
c) 158=\(\dfrac{158}{1}\)
3.
\(\dfrac{1}{1};\dfrac{2}{2};\dfrac{3}{3};\dfrac{4}{4};\dfrac{5}{5}\)
![](https://rs.olm.vn/images/avt/0.png?1311)
Ta có: 5 = 5/1
10 = 10/1
117 = 007/1
2015 = 2015/1
2016 = 2016/1
Mn nhớ kb với tui nha
5= \(\frac{5}{1}\); 10= \(\frac{10}{1}\); 117= \(\frac{117}{1}\); 2015= \(\frac{2015}{1}\); 2016= \(\frac{2016}{1}\).
![](https://rs.olm.vn/images/avt/0.png?1311)
\(a,5=\dfrac{20}{4};11=\dfrac{44}{4};21=\dfrac{84}{4};200=\dfrac{800}{4};125=\dfrac{500}{4};2000=\dfrac{8000}{4}\\ b,2=\dfrac{108}{54};3=\dfrac{108}{36};108=\dfrac{108}{1};1=\dfrac{108}{108};9=\dfrac{108}{12};4=\dfrac{108}{27};6=\dfrac{108}{18}\)
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a: 5/3=10/6=25/15=35/21
b: 5/7=35/49
6/15=12/30
4/5=16/20
c: 6=216/36=324/54=108/18
a)\(\dfrac{5}{3}=\dfrac{10}{6}=\dfrac{25}{15}=\dfrac{35}{21}\)
b)\(\dfrac{5}{7}=\dfrac{35}{49};\dfrac{6}{15}=\dfrac{12}{30};\dfrac{4}{5}=\dfrac{16}{20}\)
c) \(6=\dfrac{216}{36}=\dfrac{324}{54}=\dfrac{108}{18}\)
![](https://rs.olm.vn/images/avt/0.png?1311)
\(\dfrac{19}{30}=\dfrac{1}{30}+\dfrac{1}{10}+\dfrac{1}{2}\)
6 = \(\dfrac{12}{2}\); 9 = \(\dfrac{18}{2}\); 12 = \(\dfrac{24}{2}\); 13 = \(\dfrac{26}{2}\)
6/2;9/2;12/2;13/2