27/36=3/4                                       75/100=3/4

26/91=2/7                                         1515/1919=15/19

27/36=3/4                                       75/100= 3/4

26/91=   2/7                                      1515/1919= 15/19

Rút gọn phân số

\(\frac{26}{91}=\frac{26:13}{91:13}=\frac{2}{7}\)

\(\frac{1515}{1919}=\frac{1515:101}{1919:101}=\frac{15}{19}\)

Quy đồng mẫu số các phân số

*\(\frac{5}{6}=\frac{5.4}{6.4}=\frac{20}{24}\)và  \(\frac{7}{8}=\frac{7.3}{8.3}=\frac{21}{24}\)

*\(\frac{5}{12}=\frac{5.2}{12.2}=\frac{10}{24}\);  \(\frac{2}{3}=\frac{2.8}{3.8}=\frac{16}{24}\) và \(\frac{7}{24}\)

So sánh phân số

*Ta có : \(\frac{3}{2}=\frac{3.94}{2.94}=\frac{282}{188}\)

=> \(\frac{187}{188}< \frac{282}{188}\) hoặc \(\frac{187}{188}< \frac{3}{2}\)

*\(\frac{3}{15}=\frac{1}{5}\)

Ta có : \(\frac{2}{9}=\frac{2.5}{9.5}=\frac{10}{45}\) và \(\frac{1}{5}=\frac{1.9}{5.9}=\frac{9}{45}\)

=> \(\frac{10}{45}>\frac{9}{45}\) hoặc \(\frac{2}{9}>\frac{1}{5}\)

~gOOd sTUDy~ :))

1414+1515+1616+1717+1818+1919/2020+2121+2222+2323+2424+2525

=14.101+15.101+16.101+17.101+18.101+19.101/20.101+21.101+22.101+23.101+24.101+25.101

=14+15+16+17+18+19/20+21+22+23+24+25

=99/135

=11/15

\(\frac{222222}{323232}=\frac{222222:20202}{323232:20202}=\frac{11}{16}\)

\(\frac{121212}{484848}=\frac{121212:121212}{484848:121212}=\frac{1}{4}\)

\(\frac{5555}{7575}=\frac{5555:505}{7575:505}=\frac{11}{15}\)

\(\frac{1111}{5656}=\frac{1111:101}{5656:101}=\frac{11}{56}\)

\(\frac{1919}{4141}=\frac{1919:101}{4141:101}=\frac{19}{41}\)

\(\frac{1515}{4545}=\frac{1515:1515}{4545:1515}=\frac{1}{3}\)

\(\frac{1515}{3636}=\frac{1515:303}{3636:303}=\frac{5}{12}\)

nhiều thế bạn

CHÚC BẠN HỌC GIỎI

1,11/16   2,1/4  3,11/15  4,11/56  5,19/41  6,1/3  7,5/12

\(24m=\frac{24}{1000}km=\frac{3}{125}km.\)

6 yến = \(\frac{6}{100}\)tấn = \(\frac{3}{50}\)tấn.

------------------------------------------------------------------------

\(\frac{1515}{1717}=\frac{1515\div101}{1717\div101}=\frac{15}{17}\)

24m = \(\frac{24}{1000}\)km = \(\frac{3}{125}\)km

6 yến = \(\frac{6}{100}\)tấn = \(\frac{3}{50}\)tấn

\(\frac{1515}{1717}\)= \(\frac{15}{17}\)

24m=24/1000km=3/125km

6 yến=6/100 tấn=3/50 tấn

1515/1717 = 15/17

1010/1313=10/13

\(\frac{10}{13}\)

1010/1313=10/13

viết câu hỏi kiểu gì thế ad

 176/187 = 176 :11 / 187 :11 = 16/17.

1313/1515 = 1313 : 101/1515 : 101 = 13/15.

\(\frac{176}{187}\)\(=\)\(\frac{176:11}{187:11}\)\(=\)\(\frac{16}{17}\)

\(\frac{1313}{1515}\)\(=\)\(\frac{1313:101}{1515:101}\)\(=\)\(\frac{13}{15}\)

\(\dfrac{1313}{1515}=\dfrac{1313:101}{1515:101}=\dfrac{13}{15}\)

____

\(\dfrac{176}{187}=\dfrac{176:11}{187:11}=\dfrac{16}{17}\)

\(\dfrac{1313}{1515}=\dfrac{1313:101}{1515:101}=\dfrac{13}{15}\)

\(\dfrac{176}{187}=\dfrac{176:11}{187:11}=\dfrac{16}{17}\)

1313:1011515:1011313:1011515:101 = $\frac{13}{15}$

1313151513131515 = $\frac{13}{15}$