Question

tính bằng hai cách 

3/2.(1/3+4/9)

 

Answer 1

cách 1:

\(\frac{3}{2}.\left(\frac{1}{3}+\frac{4}{9}\right)=\frac{3}{2}.\left(\frac{3}{9}+\frac{4}{9}\right)=\frac{3}{2}.\frac{7}{9}=\frac{7}{6}\)

cách 2:

\(\frac{3}{2}.\left(\frac{1}{3}+\frac{4}{9}\right)=\frac{3}{2}.\frac{1}{3}+\frac{3}{2}.\frac{4}{9}=\frac{1}{2}+\frac{2}{3}=\frac{3}{6}+\frac{4}{6}=\frac{7}{6}\)

Answer 2

=    3/2 . 7/9 = 7/6 

Answer 3

c1:=\(\frac{3}{2}x\frac{7}{9}=\frac{3x7}{2x9}=\frac{7}{2x3}=\frac{7}{6}\)

c2:=\(\frac{3}{2}x\frac{1}{3}+\frac{3}{2}x\frac{4}{9}=\frac{1}{2}+\frac{2}{3}=\frac{7}{6}\)