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\(\frac{48}{96}=\frac{48:48}{96:48}=\frac{1}{2}\)
\(\frac{42}{98}=\frac{42:14}{98:14}=\frac{3}{7}\)
\(\frac{80}{240}=\frac{80:80}{240:80}=\frac{1}{3}\)
\(\frac{75}{100}=\frac{75:25}{100:25}=\frac{3}{4}\)
\(\frac{64}{720}=\frac{64:16}{720:16}=\frac{4}{45}\)
\(\frac{15}{120}=\frac{15:15}{120:15}=\frac{1}{8}\)
48/96=1/2
42/98=3/7
80/240=1/3
75/100=3/4
64/720=4/45
15/120=1/8
a)
`6/9=2/3`
`6/24=1/4`
`48/96=1/2`
`42/98=3/7`
b)
`24/36=2/3`
`18/30=3/5`
`15/120=1/8`
`80/240=1/3`
a)\(\dfrac{6}{9}=\dfrac{6:3}{9:3}=\dfrac{2}{3}\)
\(\dfrac{6}{24}=\dfrac{6:6}{24:6}=\dfrac{1}{4}\)
\(\dfrac{48}{96}=\dfrac{48:48}{96:48}=\dfrac{1}{2}\)
\(\dfrac{42}{98}=\dfrac{42:14}{98:14}=\dfrac{3}{7}\)
b)\(\dfrac{24}{36}=\dfrac{24:12}{36:12}=\dfrac{2}{3}\)
\(\dfrac{18}{30}=\dfrac{18:6}{30:6}=\dfrac{3}{5}\)
\(\dfrac{15}{120}=\dfrac{15:15}{120:15}=\dfrac{1}{8}\)
\(\dfrac{80}{240}=\dfrac{80:80}{240:80}=\dfrac{1}{3}\)
1
\(\frac{2}{12;}=\frac{1}{6}\)
\(\frac{42}{63}=\frac{1}{2}\)
\(\frac{5}{60}=\frac{1}{12}\)
2.
\(\frac{3}{4}=\frac{15}{12}\) số còn lại giữ nguyên
\(\frac{20}{5}=\frac{120}{30};\frac{7}{6}=\frac{35}{30}\)
\(\frac{1}{6}\) \(\frac{7}{9}\) \(\frac{1}{12}\)
\(\frac{5}{12}và\frac{9}{12}\) \(\frac{120}{30}và\frac{35}{30}\)
\(\frac{93}{42}=\frac{93:3}{42:3}=\frac{31}{14}\)
\(\frac{86}{24}=\frac{86:2}{24:2}=\frac{43}{12}\)
\(\frac{124}{80}=\frac{124:4}{80:4}=\frac{31}{20}\)
\(\frac{1}{3}\)+ \(\frac{1}{6}\)+ \(\frac{1}{12}\)+\(\frac{1}{24}\)+\(\frac{1}{48}\)+\(\frac{1}{96}\)
= ( \(\frac{1}{3}\)+\(\frac{1}{6}\)) + ( \(\frac{1}{12}\)+ \(\frac{1}{24}\)) + ( \(\frac{1}{48}\)+\(\frac{1}{96}\))
= \(\frac{1}{2}\) + \(\frac{1}{8}\) + \(\frac{1}{32}\)
= \(\frac{5}{8}\) + \(\frac{1}{32}\)
= \(\frac{21}{32}\)
Làm câu a)
2/3+4/3x3/6=2/3+2/3=4/3
Làm câu b)
9/24=3/8
Làm câu c)
355/985+355/985=710/985
Vậy.................
6/9=2/3
6/24=1/4
48/96=1/2
42/98=3/7
2/3 ; 1/4 ; 1/2;3/7 cho **** nha bạn thương