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`117/234=(117:117)/(234:117)=1/2`
`90/126=(90:18)/(126:18)=5/7`
`162162/345345=(162162:3003)/(345345:3003)=54/115`
\(\dfrac{117}{234}\)= \(\xrightarrow[234:117]{117:117}\) = \(\dfrac{1}{2}\) \(\dfrac{162162}{345345}\) = \(\xrightarrow[345345:3003]{162162:3003}\) =\(\dfrac{54}{115}\)
\(\dfrac{90}{126}\)= \(\xrightarrow[126:18]{90:18}\) = \(\dfrac{5}{7}\)
Bài 1:
18/27=2/3
35/25=7/5
54/72=3/4
78/66=13/11
92/100=23/25
75/125=3/5
126/165=42/55
150/300=1/2
1717/1515=17/15
\(\frac{90}{126}\)=\(\frac{90:18}{126:18}\)=\(\frac{5}{7}\)
Học tốt
90 90 : 9 10 10 : 2 5
-- = --------- = --- = ---------- = ----
126 126 : 9 14 14 : 2 7
a: 90/126=5/7<6/7
b: 70/84=5/6
35/42=5/6
=>70/84=35/42
Bài 1:
\(\frac{90}{126}=\frac{5}{7};\frac{6}{7}=\frac{6}{7}\)
\(\frac{90}{126}=\frac{5}{7};\frac{35}{49}=\frac{5}{7}\)
Bài 2:
ta có: 8/9 = 0,8888
19/20 = 0,95
10/11 = 0,9090
21/22 = 0,9595
=> 21/22 là phân số lớn nhất
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)\(\dfrac{24}{36}=\dfrac{24:12}{36:12}=\dfrac{2}{3}\)
\(\dfrac{18}{30}=\dfrac{18:6}{30:6}=\dfrac{3}{5}\)
\(\dfrac{15}{120}=\dfrac{15:15}{120:15}=\dfrac{1}{8}\)
\(\dfrac{80}{240}=\dfrac{80:80}{240:80}=\dfrac{1}{3}\)
TL
a, 18 / 5
b, 21 / 11
Khi nào rảnh vào kênh H-EDITOR xem vid nha!!! Thanks!
TL:
a) \(\frac{90}{25}\)=\(\frac{90:5}{25:5}\)=\(\frac{18}{5}\)
b) \(\frac{126}{66}\)=\(\frac{126:6}{66:6}\)=\(\frac{21}{11}\)
HT (^-^)