Question

7/3 - 1/12 = 

4/7 : 12/14 = 

6/19 : 18/38 =

Cả lời giải nhé?

Answer 1

`7/3 - 1/12 = (7xx4)/(3xx4)=28/12-1/12=(28-1)/12=27/12=9/4`

`4/7 : 12/14 = 4/7 xx 14/12 = 4/7 xx 7/6 = (4xx7)/(7xx6)=4/6=2/3`

`6/19 : 18/38 =6/19 : 9/19 = 6/19 xx 19/9 =(6xx19)/(19xx9) = 6/9=2/3`

`#LeMichael`

Answer 2

\(\dfrac{7}{3}-\dfrac{1}{12}=\dfrac{28-1}{12}=\dfrac{27}{12}=\dfrac{9}{4}\)

\(\dfrac{4}{7}:\dfrac{12}{14}=\dfrac{4}{7}\cdot\dfrac{14}{12}=\dfrac{4\cdot14}{7\cdot12}=\dfrac{56}{84}=\dfrac{14}{21}\)

\(\dfrac{6}{19}:\dfrac{18}{38}=\dfrac{6}{19}\cdot\dfrac{38}{18}=\dfrac{228}{342}=\dfrac{38}{57}\)