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15/24 = 5/8 ; 21/24 = 7/8 ; 54/18 = 9/3 ; 100/25 = 4/1.
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a)\(\frac{16}{20}=\frac{4}{5};\frac{9}{15}=\frac{3}{5}\)
Vì 4>3\(\Rightarrow\frac{4}{5}>\frac{3}{5}\) hay \(\frac{16}{20}>\frac{9}{15}\)
Vậy \(\frac{16}{20}>\frac{9}{15}\)
b) \(\frac{6}{8}=\frac{3}{4};\frac{3}{12}=\frac{1}{4}\)
Vì 3>1 \(\Rightarrow\frac{3}{4}>\frac{1}{4}\) hay \(\frac{6}{8}=\frac{3}{12}\)
Vậy \(\frac{6}{8}=\frac{3}{12}\)
c) \(\frac{15}{25}=\frac{3}{5};\frac{36}{45}=\frac{4}{5}\)
Vì 3<4 \(\Rightarrow\frac{3}{5}<\frac{4}{5}\) hay \(\frac{15}{25}<\frac{36}{45}\)
Vậy \(\frac{15}{25}<\frac{36}{45}\)
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25/40 = 25:5/40:5 = 5/8
42/72 = 42:6/72:6 = 7/12
80/100 = 80:20/100:20 = 4/5
1. 5/8 ( chia cho 5)
2. 7/12 (chia cho 6)
3. 4/5 (chia cho 20)
duyệt đi
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Ta có:\(\frac{39}{65}=\frac{39:13}{65:13}=\frac{3}{5}\)
Vậy phân số \(\frac{39}{65}\) rút gọn được \(\frac{3}{5}\)
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\(\frac{65}{91}=\frac{65:13}{91:13}=\frac{5}{7}\)
\(\frac{1414}{1919}=\frac{1414:101}{1919:101}=\frac{14}{19}\)
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Phân số tối giản là: 5/7, 23/24
Phân số rút gọn là: 6/9, 12/24, 6/14
6/9=2/3 12/24=1/2 6/14=3/7
\(\frac{12}{16}=\frac{3}{4}\)
\(\frac{45}{54}=\frac{5}{6}\)
\(\frac{30}{65}=\frac{6}{13}\)
\(\frac{25}{75}=\frac{1}{3}\)
\(\frac{12}{1000}=\frac{3}{250}\)