không qui đồng,hãy so sánh 2 phân số sau:
\(\frac{121212}{131313}\)và\(\frac{12}{18}\)
Hãy nhập câu hỏi của bạn vào đây, nếu là tài khoản VIP, bạn sẽ được ưu tiên trả lời.
121212/131313 = 12/13
=> 12/13 < 12/ 18
Vậy ..........
k mình nha
121212/131313
=12/13
12/13>12/18
=> 121212/131313>12/18
k minh nha
\(\dfrac{121212}{131313}=\dfrac{121212:10101}{131313:10101}=\dfrac{12}{13}\)
\(\dfrac{1313}{1717}=\dfrac{101x13}{101x17}=\dfrac{13}{17}\)
\(\dfrac{131313}{171717}=\dfrac{10101x13}{10101x17}=\dfrac{13}{17}\)
Vậy \(\dfrac{1313}{1717}=\dfrac{131317}{171717}\)
\(\dfrac{1313}{1717}và\dfrac{131313}{171717}\\ \dfrac{1313}{1717}=\dfrac{13}{17}\\ \dfrac{131313}{171717}=\dfrac{13}{17}\\ \Rightarrow\dfrac{1313}{1717}=\dfrac{131313}{171717}\)
a)\(\frac{18}{91}\)< \(\frac{23}{114}\) ; b) \(\frac{1313}{9191}\) < \(\frac{1111}{7373}\)
a)\(\frac{18}{91}\)\(< \)\(\frac{23}{114}\)
b)\(\frac{1313}{9191}\)\(< \)\(\frac{1111}{7373}\)
Ta có :
\(\frac{1313}{9191}\)= \(\frac{1}{7}\)= \(\frac{11}{77}\)
\(\frac{1111}{7373}\)= \(\frac{11}{73}\)
Vì \(\frac{11}{77}\)< \(\frac{11}{73}\)( 77>73)
=> \(\frac{1313}{9191}\)> \(\frac{1111}{7373}\)
\(\frac{1313}{9191}=\frac{1}{7}=\frac{1.11}{7.11}=\frac{11}{77}\)
\(\frac{1111}{7373}=\frac{11}{73}\)
\(\Rightarrow\frac{11}{77}< \frac{11}{73}\Rightarrow\frac{1313}{9191}>\frac{1111}{7373}\)
không quy đồng thì rút gọn
121212/131313=12/13
vậy 12/13>12/18
121212/131313=12/13.ve nha hoc bai nhe da tung hoc roi
hai phan so co tu so bang nhau thi mau so phan so nao lon hon thi phan so do be hon.tiep theo tu nghi
het