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`a,MSC:45`
`7/9=(7xx5)/(9xx5)=35/45`
`2/5=(2xx9)/(5xx9)=18/35`
`b,MSC:21`
`6/7=(6xx3)/(7xx3)=18/21`
`17/21` giữ nguyên
`c,MSC:36`
`2/3=(2xx12)/(3xx12)=24/36`
`1/4=(1xx9)/(4xx9)=9/36`
`5/9=(5xx4)/(9xx4)=20/36`
a: 2/11=4/22
19/22=19/22
b: 6/11=30/55
7/5=77/55
c: 7/8=35/40
8/5=64/40
d: 7/8=21/24
5/6=20/24
a: 2/11=4/22
19/22=19/22
b: 6/11=30/55
7/5=77/55
c: 7/8=35/40
8/5=64/40
d: 7/8=21/24
5/6=20/24
#\(N\)
`a, MSC: 12`
`2/3 =`\(\dfrac{2\times4}{3\times4}=\dfrac{8}{12}\)
`b, MSC: 36`
\(\dfrac{4}{9}=\dfrac{4\times4}{9\times4}=\dfrac{16}{36}\)
`c, MSC: 35`
\(\dfrac{6}{7}=\dfrac{6\times5}{7\times5}=\dfrac{30}{35}\)
a: 5/7=25/35
12/5=84/60
b: 2/3=30/45
4/5=36/45
8/9=40/45
\(1:MSC:16\\ \dfrac{3}{4}=\dfrac{3\times4}{4\times4}=\dfrac{12}{16};\dfrac{3}{16}\\ 2:MSC:56\\ \dfrac{3}{7}\times=\dfrac{3\times8}{7\times8}=\dfrac{24}{56};\dfrac{7}{8}=\dfrac{7\times7}{8\times7}=\dfrac{49}{56}\)
49/35 , 30/35
cho mik xin k nha