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a: \(\dfrac{7}{8}=\dfrac{441}{504}\)
\(\dfrac{5}{14}=\dfrac{180}{504}\)
\(\dfrac{4}{63}=\dfrac{32}{504}\)
b: \(\dfrac{2}{5}=\dfrac{72}{180}\)
\(\dfrac{13}{45}=\dfrac{52}{180}\)
\(\dfrac{5}{12}=\dfrac{75}{180}\)
a) \(\dfrac{23}{24}< 1\)
\(\dfrac{24}{23}>1\)
\(\Rightarrow\dfrac{23}{24}< \dfrac{24}{23}\)
b) \(\dfrac{4}{21}< \dfrac{4}{20}=\dfrac{1}{5}=\dfrac{6}{30}< \dfrac{6}{29}\)
c) \(\dfrac{6}{7}=1-\dfrac{1}{7}< \dfrac{8}{9}=1-\dfrac{1}{9}\)
d) \(\dfrac{1212}{1313}=\dfrac{12\times101}{13\times101}=\dfrac{12}{13}\)
a) \(\dfrac{12}{14}=\dfrac{1200}{1400}=\dfrac{1400-200}{1400}=1-\dfrac{200}{1400}\)
\(\dfrac{1212}{1414}=\dfrac{1414-200}{1414}=1-\dfrac{200}{1414}\)
vì \(\dfrac{200}{1414}< \dfrac{200}{1400}\)
Nên \(1-\dfrac{200}{1400}< 1-\dfrac{200}{1414}\)
Vậy \(\dfrac{12}{14}< \dfrac{1212}{1414}\)
Các bài sau tương tự
a) 1/2
b) 18/17; 17/16; 16/15; 15/14; 14/13; 13/12; 10/9
Nhớ k cho mk nha
a)1/2
b)Vì 18/17 <17/16 <16/15<15/14< 14/13< 13/12< 10/9
Nên, ta có:
18/17; 17/16; 16/15; 15/14; 14/13; 13/12; 10/9.
\(a,\dfrac{4}{9};\dfrac{5}{7}\left(MSC=63\right)\)
\(\dfrac{4}{9}=\dfrac{4\times7}{9\times7}=\dfrac{28}{63}\)
\(\dfrac{5}{7}=\dfrac{5\times9}{7\times9}=\dfrac{45}{63}\)
\(b,\dfrac{7}{12};\dfrac{3}{4}\left(MSC=12\right)\)
\(\dfrac{7}{12}\) giữ nguyên
\(\dfrac{3}{4}=\dfrac{3\times3}{4\times3}=\dfrac{9}{12}\)
\(c,\dfrac{13}{27};\dfrac{1}{3}\) và \(\dfrac{5}{9}\left(MSC=27\right)\)
\(\dfrac{13}{27}\) giữ nguyên
\(\dfrac{1}{3}=\dfrac{1\times9}{3\times9}=\dfrac{9}{27}\)
\(\dfrac{5}{9}=\dfrac{5\times3}{9\times3}=\dfrac{15}{27}\)
Đáp án :
a) 4/7 < 7/4
b) 13/14 > 13/15
c)11/12 > 9/10
Học tốt !!!!!!!!!!
a, <
b, >
c,>