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b, \(\dfrac{7}{13}\) và \(\dfrac{17}{23}\)
\(\dfrac{7}{13}\) < \(\dfrac{7+10}{13+10}\) = \(\dfrac{17}{23}\)
Vậy \(\dfrac{7}{13}\) < \(\dfrac{17}{23}\)
\(\dfrac{12}{48}\) = \(\dfrac{12:12}{48:12}\) = \(\dfrac{1}{4}\)
\(\dfrac{13}{47}\) > \(\dfrac{13}{52}\) = \(\dfrac{13:13}{52:13}\) = \(\dfrac{1}{4}\)
Vậy \(\dfrac{12}{48}\) < \(\dfrac{13}{47}\)
a) có 12/48 < 13/48, 13/48 < 13/47 => 12/48 < 13/47 b) có 415/395 > 1 , 572/581 <1 => 415/395 > 572/581
a) có 12/48 < 13/48, 13/48 < 13/47
=> 12/48 < 13/47
b) có 415/395 > 1 , 572/581 <1
=> 415/395 > 572/581
a/Ta có: \(\frac{7}{13}+\frac{6}{13}=1\) ;\(\frac{17}{23}+\frac{6}{23}=1\)
Vì \(\frac{6}{13}>\frac{6}{23}\)nên\(\frac{7}{13}< \frac{17}{23}\)
b/Ta có: \(\frac{12}{48}< \frac{12}{47}\) ; \(\frac{12}{47}< \frac{13}{47}\)\(\Rightarrow\frac{12}{48}< \frac{13}{47}\)
Do \(\frac{23}{28}< \frac{23}{27}< \frac{24}{27}\)
=> 23/28 < 24/27
Ủng hộ mk nha ^_-
a) \(\dfrac{252525}{666666}=\dfrac{25.10101}{66.10101}=\dfrac{25}{66}\)
⇒\(\dfrac{25}{66}=\dfrac{252525}{666666}\)
b: \(\dfrac{23}{24}=1-\dfrac{1}{24}\)
\(\dfrac{24}{25}=1-\dfrac{1}{25}\)
mà \(-\dfrac{1}{24}>-\dfrac{1}{25}\)
nên \(\dfrac{23}{24}>\dfrac{24}{25}\)
a: \(\dfrac{25}{66}=\dfrac{252525}{666666}\)
b: \(\dfrac{23}{24}=1-\dfrac{1}{24}\)
\(\dfrac{24}{25}=1-\dfrac{1}{25}\)
mà \(-\dfrac{1}{24}< -\dfrac{1}{25}\)
nên \(\dfrac{23}{24}< \dfrac{24}{25}\)
\(\frac{23}{48}< \frac{1}{2}\)
\(\frac{47}{92}>\frac{1}{2}\)
=> \(\frac{23}{48}< \frac{47}{92}\)
K mk nha. mk nhanh nhất 100% đấy nha