các bạn giúp mình rút gọn phân số \(\frac{120}{48}\)nhá
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\(\frac{48}{96}=\frac{48:48}{96:48}=\frac{1}{2}\)
\(\frac{42}{98}=\frac{42:14}{98:14}=\frac{3}{7}\)
\(\frac{80}{240}=\frac{80:80}{240:80}=\frac{1}{3}\)
\(\frac{75}{100}=\frac{75:25}{100:25}=\frac{3}{4}\)
\(\frac{64}{720}=\frac{64:16}{720:16}=\frac{4}{45}\)
\(\frac{15}{120}=\frac{15:15}{120:15}=\frac{1}{8}\)
48/96=1/2
42/98=3/7
80/240=1/3
75/100=3/4
64/720=4/45
15/120=1/8
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\(\dfrac{90}{120}=\dfrac{30.3}{30.4}=\dfrac{3}{4}\)
\(\dfrac{15}{25}=\dfrac{5.3}{5.5}=\dfrac{3}{5}\)
\(\dfrac{18}{45}=\dfrac{9.2}{9.5}=\dfrac{2}{5}\)
\(\dfrac{36}{64}=\dfrac{4.9}{4.16}=\dfrac{9}{16}\)
\(\dfrac{32}{72}=\dfrac{8.4}{8.9}=\dfrac{4}{9}\)
\(\dfrac{84}{49}=\dfrac{7.12}{7.7}=\dfrac{12}{7}\)
\(\dfrac{90}{120}=\dfrac{3}{4};\dfrac{15}{25}=\dfrac{3}{5};\dfrac{18}{45}=\dfrac{2}{5};\dfrac{36}{64}=\dfrac{9}{16};\dfrac{32}{72}=\dfrac{4}{9};\dfrac{84}{49}=\dfrac{12}{7}\)
![](https://rs.olm.vn/images/avt/0.png?1311)
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a; \(\dfrac{1919}{2121}\) = \(\dfrac{1919:101}{2121:101}\) = \(\dfrac{19}{21}\)
b; 17 x 5 - \(\dfrac{17}{120}\) - 103
= 85 - \(\dfrac{17}{120}\) - 103
= \(\dfrac{10200}{120}\) - \(\dfrac{17}{120}\) - \(\dfrac{12360}{120}\)
= \(\dfrac{10183}{120}\) - \(\dfrac{12360}{120}\)
= \(\dfrac{-2177}{120}\)
c; 2929 - \(\dfrac{101}{2\times1919}\) + 404
= 2929 - \(\dfrac{1}{38}\) + 404
= \(\dfrac{111302}{38}\) - \(\dfrac{1}{38}\) + \(\dfrac{15352}{38}\)
= \(\dfrac{111301}{38}\) + \(\dfrac{15352}{38}\)
= \(\dfrac{126653}{38}\)
![](https://rs.olm.vn/images/avt/0.png?1311)
Theo thứ tự : 5/6 ; 2/3 ; 2/3 ; 3/2 ; 2/3 ; 3/8 ; 3/1(hay là 3)
\(\dfrac{10}{12}=\dfrac{5}{6}\) \(\dfrac{8}{12}=\dfrac{2}{3}\) \(\dfrac{10}{15}=\dfrac{2}{3}\) \(\dfrac{27}{18}=\dfrac{3}{2}\) \(\dfrac{24}{36}=\dfrac{4}{6}=\dfrac{2}{3}\)
\(\dfrac{18}{48}=\dfrac{3}{8}\) \(\dfrac{42}{14}=\dfrac{6}{2}=\dfrac{3}{1}\)
![](https://rs.olm.vn/images/avt/0.png?1311)
\(\frac{39}{75}=\frac{39:3}{75:3}=\frac{13}{25}\)
\(\frac{48}{78}=\frac{48:6}{78:6}=\frac{8}{13}\)
\(\frac{120}{90}=\frac{120:30}{90:30}=\frac{4}{3}\)
_HT_
![](https://rs.olm.vn/images/avt/0.png?1311)
120/48 rú gọn bằng 5/2
\(\frac{120}{48}\)=