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21/28=3/4
18/54=1/3
72/42=36/21
1>3/4
100/99>1
4/3>3/4
9/11<11/9
99/99=1
B1) 21/28=3/4
18/54=1/3
72/42=12/7
B2) 1>3/4
100/99>1
4/3>3/4
9/11<11/9
99/99=1
K CHO MK NHA
\(\frac{4}{12}=\frac{4:4}{12:4}=\frac{1}{3}\)
\(\frac{24}{30}=\frac{24:6}{30:6}=\frac{4}{5}\)
\(\frac{25}{100}=\frac{25:25}{100:25}=\frac{1}{4}\)
\(\frac{60}{80}=\frac{60:20}{80:20}=\frac{3}{4}\)
\(\frac{9}{18}=\frac{9:9}{18:9}=\frac{1}{2}\)
\(\frac{60}{36}=\frac{60:12}{36:12}=\frac{5}{3}\)
\(\frac{72}{54}=\frac{72:18}{54:18}=\frac{4}{3}\)
\(\frac{35}{210}=\frac{35:35}{210:35}=\frac{1}{6}\)
4/12=1/3
24/30=4/5
25/100=1/4
60/80=3/4
9/18=1/2
60/36=5/3
72/54=4/3
35/210=1/6
\(\frac{6}{9}=\frac{6:3}{9:3}=\frac{2}{3}\)
\(\frac{18}{48}=\frac{18:2}{48:2}=\frac{9}{24}\)
\(\frac{72}{84}=\frac{72:12}{84:12}=\frac{6}{7}\)
\(\frac{1212}{3939}=\frac{1212:101}{3939:101}=\frac{12}{39}\)
TL
\(\frac{6}{9}=\frac{2}{3}\)
\(\frac{18}{48}=\frac{3}{8}\)
\(\frac{72}{84}=\frac{6}{7}\)
\(\frac{1212}{3939}=\frac{4}{13}\)
nha bn\
HT
\(\frac{6}{9}=\frac{6:3}{9:3}=\frac{2}{3}\)
\(\frac{18}{48}=\frac{18:6}{48:6}=\frac{3}{8}\)
\(\frac{72}{84}=\frac{72:12}{84:12}=\frac{6}{7}\)
\(\frac{60}{120}=\frac{60:60}{120:60}=\frac{1}{2}\)
\(\frac{6}{9}=\frac{6\div3}{9\div3}=\frac{2}{3}\)
\(\frac{18}{48}=\frac{18\div6}{48\div6}=\frac{3}{8}\)
\(\frac{72}{84}=\frac{72\div12}{84\div12}=\frac{6}{7}\)
\(\frac{60}{120}=\frac{60\div60}{120\div60}=\frac{1}{2}\)
\(\frac{6}{9}=\frac{2}{3}\)
\(\frac{12}{15}=\frac{4}{5}\)
\(\frac{21}{1}=21\)
\(\frac{36}{54}=\frac{36:18}{54:18}=\frac{2}{3}\)
\(\frac{75}{200}=\frac{75:25}{200:25}=\frac{3}{8}\)
\(\frac{96}{72}=\frac{96:24}{72:24}=\frac{4}{3}\)
Rút gọn phân số
a)6/9 = 2/3
b)12/15 = 4/5
c)21/1 = 21
d)36/54 = 2/3
e)75/200 = 3/8
f)96/72 = 4/3
k cho mk nha
a) \(\frac{6}{9}=\frac{6:3}{9:3}=\frac{2}{3}\)
b)\(\frac{10}{48}=\frac{10:2}{48:2}=\frac{5}{24}\)
c)\(\frac{72}{84}=\frac{72:12}{84:12}=\frac{6}{7}\)
d)\(\frac{1212}{3939}=\frac{1212:303}{3939:303}=\frac{4}{13}\)
#H
Rút gọn phân số:
\(\frac{6}{9}=\frac{6\div3}{9\div3}=\frac{2}{3}\)
\(\frac{10}{48}=\frac{10\div2}{48\div2}=\frac{5}{24}\)
\(\frac{72}{84}=\frac{72\div12}{84\div12}=\frac{6}{7}\)
\(\frac{1212}{3939}=\frac{1212\div303}{3939\div303}=\frac{4}{13}\)
\(\frac{10}{15}=\frac{34}{51}=\frac{36}{54}\)
\(\frac{15}{20}=\frac{51}{68}=\frac{54}{72}\)
\(\frac{12}{42}=\frac{2}{7}\)
\(\frac{50}{75}=\frac{2}{3}\)
\(\frac{48}{54}=\frac{8}{9}\)
\(\frac{72}{90}=\frac{4}{5}\)
60/80=..\(\frac{3}{4}\)...
9/8=.\(\frac{9}{8}\)..
60/36=.\(\frac{5}{3}\)..
72/54=..\(\frac{4}{3}\).
35/210=.\(\frac{1}{6}\)..
hok tốt !
\(\frac{60}{80}=\frac{3}{4}\)
\(\frac{9}{8}=\frac{9}{8}\)
\(\frac{60}{36}=\frac{5}{3}\)
\(\frac{72}{54}=\frac{4}{3}\)
\(\frac{35}{210}=\frac{1}{6}\)
\(\dfrac{21}{28}=\dfrac{21:7}{28:7}=\dfrac{3}{4}\)
\(\dfrac{18}{54}=\dfrac{18:9}{54:9}=\dfrac{2}{6}=\dfrac{1}{3}\)
\(\dfrac{90}{72}=\dfrac{90:9}{72:9}=\dfrac{10}{8}=\dfrac{5}{4}\)
\(\dfrac{9}{36}=\dfrac{9:9}{36:9}=\dfrac{1}{4}\)
\(\dfrac{30}{48}=\dfrac{30:6}{48:6}=\dfrac{5}{8}\)
\(\dfrac{72}{42}=\dfrac{72:6}{42:6}=\dfrac{12}{7}\)
hs chăm chỉ :>