Rút gọn P/S :
1313/2727
151515/232323
123123/456456
( Giải thích nha nhanh mk tik)
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_ \(\frac{7}{9}=\frac{7\times11}{9\times11}=\frac{7\times111}{9\times111}\Rightarrow\frac{7}{9}=\frac{77}{99}=\frac{777}{999}\)
_ \(\frac{13}{15}=\frac{13\times101}{15\times101}=\frac{13\times10101}{15\times10101}\Rightarrow\frac{13}{15}=\frac{1313}{1515}=\frac{131313}{151515}\)
_ \(\frac{20172017}{20072007}=\frac{20172017:10001}{20072007:10001}\Rightarrow\frac{20172017}{20072007}=\frac{2017}{2007}\)
_ \(\frac{123123}{456456}=\frac{123123:1001}{456456:1001}\Rightarrow\frac{123123}{456456}=\frac{123}{456}\)
~ Ủng hộ mk nha!~
\(a,-\frac{9}{12}=-\frac{9:3}{12:3}=-\frac{3}{4}\)
\(\frac{-18}{-24}=\frac{\left(-18\right):\left(-6\right)}{\left(-24\right):\left(-6\right)}=\frac{3}{4}\)
\(-\frac{35}{70}=-\frac{35:35}{70:35}=\frac{1}{2}\)
\(-\frac{9}{27}=-\frac{9:9}{27:9}=-\frac{1}{3}\)
\(b,\frac{1313}{4242}=\frac{1313:101}{4242:101}=\frac{13}{42}\)
\(\frac{-353535}{-424242}=\frac{\left(-353535\right):\left(-70707\right)}{\left(-424242\right):\left(-70707\right)}=\frac{5}{6}\)
\(c,\frac{2^3\times4^3\times5^4}{8^2\times25^3\times7}=\frac{2^3\times4^3\times25^2}{8\times8^2\times25^2\times25\times7}\) ( 4^3 = 8^2 ; 5^4 = 25^2 )
\(=\frac{1}{25\times7}=\frac{1}{175}\)
\(a.\frac{-9}{-12}=\frac{-9:3}{-12:3}=\frac{-3}{-4}.\)
\(\frac{-18}{-24}=\frac{-18:6}{-24:6}=\frac{-3}{-4}\)
\(\frac{-35}{-70}=\frac{-35:35}{-70:35}=\frac{-1}{-2}\)
\(\frac{-9}{-27}=\frac{-9:9}{-27:9}=\frac{-1}{-3}\)
a)
\(\frac{13}{27}=\frac{13.101}{27.101}=\frac{1313}{2727}\)
=> \(\frac{13}{27}=\frac{1313}{2727}\)
b)
\(-\frac{15}{23}=-\frac{15.10101}{23.10101}=-\frac{151515}{232323}\)
=>\(-\frac{15}{23}=-\frac{151515}{232323}\)
a) \(\frac{1313}{2727}=\frac{1313:101}{2727:101}=\frac{13}{27}\)
Vậy \(\frac{13}{27}=\frac{1313}{2727}\)
b) \(-\frac{151515}{232323}=\frac{-151515:10101}{232323:10101}=-\frac{15}{23}\)
Vậy \(-\frac{15}{23}=-\frac{151515}{232323}\)
A=\(\dfrac{1313}{2121}\)*\(\dfrac{165165}{143143}\)*\(\dfrac{424242}{151515}\)
A=\(\dfrac{13}{3\cdot7}\)*\(\dfrac{3\cdot5}{13}\)*\(\dfrac{2\cdot7}{5}\)
A=\(\dfrac{13}{21}\)*\(\dfrac{15}{13}\)*\(\dfrac{14}{5}\)
A=\(\dfrac{13\cdot3\cdot5\cdot2\cdot7}{3\cdot7\cdot13\cdot5}\)
A= 2
a)\(\frac{13}{14}\) b)\(\frac{23}{42}\) c)\(\frac{41}{152}\)d)\(\frac{8575}{512}\)
mình chỉ biết làm bài 1 thôi
\(\frac{169}{182}=\frac{13}{14}\)
b,\(\frac{2323}{4242}\)=\(\frac{23}{42}\)
c,\(\frac{123123}{456456}\)=\(\frac{41}{152}\)
\(\frac{35\cdot54}{16\cdot49\cdot10}=\frac{27}{112}\)
2,,\(\frac{16}{36}=\frac{4}{9}\) \(\frac{20}{45}=\frac{4}{9}\) \(\frac{28}{63}=\frac{4}{9}\)
Vậy 3 phân số này bằng nhau.
b,\(\frac{45}{65}=\frac{9}{13}\) \(\frac{48}{52}=\frac{12}{13}\) \(\frac{2121}{1313}=\frac{21}{13}\)
Vậy phân số \(\frac{2121}{1313}\) lớn nhất
Ta có :
\(\frac{2727}{4242}=\frac{2727:303}{4242:303}=\frac{9}{14}\)
Vậy rút gọ được : 9/14
k mik nha bn
thank you very much
\(\frac{2727}{4242}\) = \(\frac{2727:303}{4242:303}\) = \(\frac{9}{14}\)
Giải: \(\frac{1212}{1313}=\frac{1212:101}{1313:101}=\frac{12}{13}\)
Rút gọn
\(\frac{1313}{2727}=\frac{13\cdot101}{27\cdot101}=\frac{13}{27}\)
\(\frac{151515}{232323}=\frac{15\cdot10101}{23\cdot10101}=\frac{15}{23}\)
\(\frac{123123}{456456}=\frac{123\cdot1001}{456\cdot1001}=\frac{123}{456}=\frac{41\cdot3}{152\cdot3}=\frac{41}{152}\)
hok tốt
==.== mk làm vậy thôi , nếu sai thì thông cảm cho mk nha ...