So sánh: \(\frac{3}{124},\frac{1}{41},\frac{2}{83},\frac{5}{207}\)
So sánh:
\(\frac{3}{124},\frac{1}{41},\frac{2}{83},\frac{5}{207}\)
\(\frac{-2525}{2929}v\text{à}\frac{-217}{245}\)
So sánh :
a)\(\frac{3}{124},\frac{1}{41},\frac{5}{207},\frac{2}{83}\)
b)\(\frac{-2525}{2929}và\frac{-217}{245}\)
c)\(A=\frac{3^{10}+1}{3^9+1}vàB=\frac{3^9+1}{3^8+1}\)
d)\(\frac{27}{82}và\frac{26}{75}\)
so sánh :
a) \(\frac{3}{124};\frac{1}{41};\frac{5}{207}và\frac{2}{83}\)
b)\(\frac{16}{9}và\frac{24}{13}\)
c)\(\frac{27}{82}và\frac{26}{72}\)
so sánh
\(\frac{3}{124};\frac{1}{41};\frac{5}{207};\frac{2}{83}\)
\(\frac{16}{9};\frac{24}{13}\)
\(\frac{27}{82};\frac{26}{75}\)
\(\frac{134}{43};\frac{55}{21};\frac{74}{19};\frac{116}{37}\)
\(-\frac{2525}{2929};-\frac{217}{245}\)
\(-\frac{4}{78};\frac{64}{-95}\)
\(-\frac{49}{78};\frac{64}{-95}\)
a/ Ta có:
\(\frac{3}{124}=\frac{30}{1240}\) ; \(\frac{1}{41}=\frac{30}{1230}\) ; \(\frac{5}{207}=\frac{30}{1242}\) ; \(\frac{2}{83}=\frac{30}{1245}\)
Vì các phân số trên đều cùng tử nên ta so sánh mẫu : 1230<1240<1242<1242
=> \(\frac{30}{1230}>\frac{30}{1240}>\frac{30}{1242}>\frac{30}{1245}\)
Hay : \(\frac{1}{41}>\frac{3}{124}>\frac{5}{207}>\frac{2}{83}\)
b/ Ta có:
\(\frac{16}{9}=\frac{48}{27};\frac{24}{13}=\frac{48}{26}\)
Vì 27>26
=> \(\frac{16}{9}< \frac{24}{13}\)
3124=3012403124=301240 ; 141=301230141=301230 ; 5207=3012425207=301242 ; 283=301245283=301245
Vì các phân số trên đều cùng tử nên ta so sánh mẫu : 1230<1240<1242<1242
=> 301230>301240>301242>301245301230>301240>301242>301245
Hay : 141>3124>5207>283141>3124>5207>283
b/ Ta có:
169=4827;2413=4826169=4827;2413=4826
Vì 27>26
=> 169<2413169<2413
Sắp xếp theo thứ tự tăng dần: \(\frac{3}{124};\frac{1}{41};\frac{5}{207};\frac{2}{83}\)
So sánh các phân số:
a)\(\frac{3}{124},\frac{1}{41},\frac{5}{207},\frac{2}{83}\)
b)\(\frac{134}{43},\frac{55}{21},\frac{74}{19},\frac{116}{37}\)
c)\(\frac{-2525}{2929},,\frac{-217}{245}\)
d)\(\frac{27}{28},\frac{26}{75}\)
e)\(\frac{-49}{78}.\frac{64}{-95}\)
so sánh :
3/124 ; 1/41 : 5/207 ;2/83
bài 1:So sánh các phân số sau:
a) \(\frac{3}{124}\);\(\frac{1}{41}\);\(\frac{5}{207}\);\(\frac{2}{83}\)
b)\(\frac{134}{43}\);\(\frac{55}{21}\);\(\frac{74}{19}\);\(\frac{116}{37}\)
c) A=\(\frac{54.107-53}{53.107+54}\)và B=\(\frac{135.269-133}{134.269+135}\)
d)\(\frac{-49}{78}\);\(\frac{64}{-95}\)
\(x = {-b \pm \sqrt{b^2-4ac} \over 2a}\)A=54-53/53+54=1/107=2/214
B=135-133/134+135=2/169
tự so sánh tiếp
Bài 1: So sánh các ps sau:
a)\(\frac{1}{2};\frac{1}{3};\frac{2}{3}\)
b)\(\frac{4}{9};-\frac{1}{2};\frac{3}{7}\)
c)\(\frac{3}{124};\frac{1}{41};\frac{5}{207};\frac{2}{83}\)
d)\(\frac{134}{43};\frac{55}{21};\frac{74}{19};\frac{116}{37}\)
e)\(\frac{16}{9};\frac{24}{13}\)
g)\(\frac{-2525}{2929};\frac{-217}{245}\)
h)\(\frac{27}{82};\frac{26}{75}\)
i)\(\frac{-49}{75};\frac{64}{-95}\)