Question

 

Answer 1

a: 4/5=36/45

7/9=35/45

b: 5/6=15/18

17/18=17/18

c: 3/8=9/24

7/12=14/24

Answer 2

a)

`MSC : 45`

` 4/5 = ( 4xx9)/(5xx9) = 36/45`

` 7/9 = ( 7xx5)/(9xx5) = 35/45`

 

`b)`

`MSC : 18`

` 5/6 = ( 5xx3)/(6xx3) = 15/18`

`17/18`

 

`c) `

`MSC: 24`

` 3/8 = ( 3xx3)/(8xx3) = 9/24`

` 7/12 = ( 7xx2)/(12xx2) = 14/24`

Answer 3

`2)`

`a)4/5` và `7/9`

Ta có : `MSC:45`

`4/5=(4xx9)/(5xx9)=36/45`

`7/9=(7xx5)/(9xx5)=35/45`

`b)5/6` và `17/18`

Ta có : `MSC:18`

`5/6=(5xx3)/(6xx3)=15/18`

`17/18` Giữ nguyên

`c)3/8` và `7/12`

Ta có : `MSC:24`

`3/8=(3xx3)/(8xx3)=9/24`

`7/12=(7xx2)/(12xx2)=14/24`

Answer 4

a, MSC: 45

\(\dfrac{4}{5}=\dfrac{4x9}{5x9}=\dfrac{36}{45}\)

\(\dfrac{7}{9}=\dfrac{7x5}{9x5}=\dfrac{35}{45}\)

b, MSC: 18

\(\dfrac{5}{6}=\dfrac{5x3}{6x3}=\dfrac{15}{18}\)

\(\dfrac{17}{18}\) giữ nguyên

c, MSC: 24

 \(\dfrac{3}{8}=\dfrac{3x3}{8x3}=\dfrac{9}{24}\)

\(\dfrac{7}{12}=\dfrac{7x2}{12x2}=\dfrac{14}{24}\)