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\(a,\\ Ta.có:\dfrac{16}{-19}< 0;\dfrac{15}{17}>0\\ \Rightarrow\dfrac{16}{-19}< \dfrac{15}{17}\\ b,\\ Ta.có:\dfrac{419}{-723}< 0;\dfrac{-697}{-313}>0\\ \Rightarrow\dfrac{419}{-723}< \dfrac{-697}{-313}\\ c,\dfrac{311}{256}>\dfrac{256}{256}=1;\dfrac{199}{293}< \dfrac{203}{203}=1\\ \Rightarrow\dfrac{311}{256}>\dfrac{199}{203}\)
a ) 16 − 19 < 0 < 15 17 b ) 419 − 723 < 0 < − 697 − 313
c ) 311 256 > 1 > 199 203 d ) 30 235 = 6 47 > 6 48 = 8 64 > 8 63 = 168 1323 e ) 19 60 < 20 60 = 30 90 < 31 90 f ) 15 23 > 14 23 = 70 115 > 70 117
a) Ta có: \(\frac{-697}{-313}=\frac{697}{313}>0\)
\(\frac{419}{-723}< 0\)
\(\Rightarrow\frac{419}{-713}< \frac{-697}{-313}\)
b) Ta có: \(\frac{190}{191}< 1\)
\(\frac{2019}{2018}>1\)
\(\Rightarrow\frac{190}{191}< \frac{2019}{2018}\)
c) Ta có: \(\frac{19}{27}< 1\)
\(\Rightarrow\frac{19}{27}< \frac{19.10+3}{27.10+3}\)
\(\Rightarrow\frac{19}{27}< \frac{193}{273}\)
d) Ta có: \(\frac{53}{47}< \frac{57}{47}\)
\(\frac{57}{43}>\frac{57}{47}\)
\(\Rightarrow\frac{53}{47}< \frac{57}{43}\)
a) 419/-723 < 0 < -697/-313
=> 419/-723 < -697/-313
b) 190/191 < 1 < 2019/2018
=> 190/191 < 2019/2018
d) 53/47 < 57/47 < 57/43
=> 53/47 < 57/43
a)\(\frac{6}{7}\)và\(\frac{11}{10}\)
Vì \(\frac{6}{7}< 1;\frac{11}{10}>1\Rightarrow\frac{6}{7}< \frac{11}{10}\)
b)\(\frac{-5}{7}\)và\(\frac{2}{7}\)
Vì 2 phân số này cùng mẫu; -5<2 \(\Rightarrow\frac{-5}{7}< \frac{2}{7}\)
c)\(\frac{419}{-723}\)và\(\frac{-697}{-313}\)
Vì \(\frac{419}{-723}< 0;\frac{-697}{-313}>0\Rightarrow\frac{419}{-723}< \frac{-697}{-313}\)
a) \(\frac{6}{7}\) và \(\frac{11}{10}\)
Có \(\frac{6}{7}< \frac{7}{7}\), mà \(\frac{7}{7}< \frac{11}{10}\)
\(\Rightarrow\frac{6}{7}< \frac{11}{10}\)
b)\(-\frac{5}{17}\) và \(\frac{2}{7}\)
Có \(\frac{-5}{17}< \frac{1}{17}\), mà \(\frac{1}{17}< \frac{2}{17}\)
\(\Rightarrow\frac{-5}{17}< \frac{2}{17}\)
c) \(\frac{419}{-723}\) và \(\frac{-697}{-313}\)
Có \(\frac{419}{-723}< \frac{1}{1}\), mà \(\frac{1}{1}< \frac{-697}{-313}\)
\(\Rightarrow\frac{419}{-723}< \frac{-697}{-313}\)
a)Ta có:
\(\frac{419}{-723}< 0< \frac{-697}{-313}\)
\(\Rightarrow\frac{419}{-723}< \frac{-697}{-313}\)
c)\(\frac{17}{215}>\frac{17}{314}\)
d)Ta có:
\(\frac{11}{54}< \frac{22}{54}< \frac{22}{37}\)
\(\Rightarrow\frac{11}{54}< \frac{22}{37}\)
e)Ta có:
\(\frac{-385}{-126}>0>\frac{-57}{3461}\)
\(\Rightarrow\frac{-385}{-126}>\frac{-57}{3461}\)
f)Ta có:
\(\frac{123}{109}>1>\frac{556}{789}\)
\(\Rightarrow\frac{123}{109}>\frac{556}{789}\)
g)Ta có:
\(\frac{-56}{57}>-1>\frac{-49}{47}\)
\(\Rightarrow\frac{-56}{57}>\frac{-49}{47}\)
Ta có :
\(\frac{19}{60}< \frac{20}{60}=\frac{1}{3}\)
\(\frac{31}{90}>\frac{30}{90}=\frac{1}{3}\)
=> \(\frac{31}{90}>\frac{1}{3}>\frac{19}{60}\Rightarrow\frac{31}{90}>\frac{19}{60}\)
a) 16 − 19 < 0 < 15 17
b) 419 − 723 < 0 < − 697 − 313