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\(6=\frac{6}{1}=\frac{12}{2}=\frac{24}{4}=\frac{48}{8}=\frac{96}{16}\)
\(5:9=\frac{5}{9}=\frac{10}{18}=\frac{20}{36}=\frac{40}{72}=\frac{80}{144}\)
\(1=\frac{3}{3}=\frac{5}{5}=\frac{7}{7}=\frac{9}{9}=\frac{11}{11}\)
\(0=\frac{0}{7}=\frac{0}{10}=\frac{0}{13}=\frac{0}{16}=\frac{0}{19}\)
Chúc em hok tốt!!!
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c) Các phân số được sắp xếp theo thứ tự từ lớn đến bé là:
A.\(\frac{5}{6};\frac{2}{3};\frac{4}{2}\)
B.\(\frac{4}{2};\frac{5}{6};\frac{2}{3}\)
C.\(\frac{2}{3};\frac{4}{2}:\frac{5}{6}\)
D.\(\frac{4}{2};\frac{2}{3};\frac{5}{6}\)
Khoanh B
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a) $\frac{1}{6} \times ...... = \frac{1}{6}$
$\frac{1}{6}:\frac{1}{6} = 1$
b) $......\, \times \frac{4}{7} = 0$
$0:\frac{4}{7} = 0$
c) $\frac{5}{8}:...... = \frac{5}{8}$
$\frac{5}{8}:\frac{5}{8} = 1$
![](https://rs.olm.vn/images/avt/0.png?1311)
a)2/5+3/5 = 1
b)7/8+5/8 = 12/8= 3/2
c) 1/2+1/3 = 5/6
d) 2/7+1/6= 19/42
a, 2/5 + 9/15 28/32 + 45/72 b, 4/8 + 8/24 8/28 + 5/30
= 2/5 + 3/5 = 7/8 + 5/8 = 1/2 + 1/3 = 2/7 + 1/6
= 1. = 3/2. = 5/6. = 19/42.
k cho mik nha !
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Ta thấy :
1/1x2 = 1/1 - 1/2
1/2x3 = 1/2 - 1/3
....
=>( 1/1x2 + 1/2x3 + 1/3x4 + 1/5x6 ) x 10 - x = ( 1/1 - 1/2 + 1/2 - 1/3 + 1/3 - 1/4 + 1/4 - 1/5 + 1/5 - 1/6 ) x 10 - x
= ( 1/1 - 1/6 ) x 10 - x =0
5/6 x 10 - x = 0
25/3 - x = 0
=> x = 25/3
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a) \(\frac{8}{5}-\frac{18}{27}=\frac{8}{5}-\frac{2}{3}\)
\(\Rightarrow\frac{8}{5}-\frac{2}{3}=\frac{24}{15}-\frac{10}{15}\)
\(\Rightarrow\frac{14}{15}\)
b) \(\frac{18}{21}-\frac{12}{27}=\frac{6}{7}-\frac{4}{9}\)
\(\Rightarrow\frac{6}{7}-\frac{4}{9}=\frac{54}{63}-\frac{28}{63}\)
\(\Rightarrow\frac{26}{63}\)
c) \(\frac{8}{24}-\frac{5}{25}=\frac{1}{3}-\frac{1}{5}\)
\(\Rightarrow\frac{1}{3}-\frac{1}{5}=\frac{5}{15}-\frac{3}{15}\)
\(\Rightarrow\frac{2}{15}\)
d) \(\frac{12}{20}-\frac{6}{18}=\frac{3}{5}-\frac{1}{3}\)
\(\Rightarrow\frac{3}{5}-\frac{1}{3}=\frac{9}{15}-\frac{5}{15}\)
\(\Rightarrow\frac{4}{15}\)
Trả lời:
0=\(\frac{0}{5}\)
~ Học tốt nha ~
0 = 0/5