Question

a,tìm y :                                     b, tính :

y : 2/5 = 12                               11/10 + 4/5 x 3/4                

Answer 1

a,

\(y:\dfrac{2}{5}=12\)

\(y=12\times\dfrac{2}{5}\)

\(y=\dfrac{24}{5}=4,8\)

 

b,

\(\dfrac{11}{10}+\dfrac{4}{5}\times\dfrac{3}{4}=\dfrac{11}{10}+\dfrac{12}{20}=\dfrac{22}{20}+\dfrac{12}{20}=\dfrac{34}{20}=\dfrac{17}{10}\)