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a)\(\dfrac{5}{25}=\dfrac{1}{5}\)
\(\dfrac{75}{100}=\dfrac{3}{4}\)
\(\dfrac{64}{720}=\dfrac{4}{45}\)
\(\dfrac{16}{1000}=\dfrac{2}{125}\)
b)\(\dfrac{4}{6}=\dfrac{2}{3}\)
\(\dfrac{12}{8}=\dfrac{3}{2}\)
\(\dfrac{15}{25}=\dfrac{3}{5}\)
\(\dfrac{11}{22}=\dfrac{1}{2}\)
c)\(\dfrac{5}{10}=\dfrac{1}{2}\)
\(\dfrac{12}{36}=\dfrac{1}{3}\)
\(\dfrac{9}{72}=\dfrac{1}{8}\)
\(\dfrac{75}{300}=\dfrac{1}{4}\)
d)\(\dfrac{14}{28}=\dfrac{1}{2}\)
\(\dfrac{25}{50}=\dfrac{1}{2}\)
\(\dfrac{48}{30}=\dfrac{8}{5}\)
\(\dfrac{81}{54}=\dfrac{3}{2}\)
a: 5/25=1/5
75/100=3/4
64/720=4/45
16/1000=2/125
b: 4/6=2/3
12/8=3/2
15/25=3/5
11/22=1/2
c: 5/10=1/2
12/36=1/3
9/72=1/8
75/300=1/4
d: 14/28=1/2
25/50=1/2
48/30=8/5
81/54=3/2
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
15/24 = 5/8 ; 21/24 = 7/8 ; 54/18 = 9/3 ; 100/25 = 4/1.
78/34 = 13/14
55/99 = 5/9
100/175 = 4/7
204/132 = 17/11
Chúc bạn học tốt !
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
4/6=2/3; 12/8=3/2; 15/25=3/5; 11/22=1/2;36/10=18/5; 75/36=25/12; 5/10=1/2; 12/36=1/3; 9/12=3/4;75/300=1/4; 15/35=3/7; 4/100=1/25