Question

b. Tính giá trị của biểu thức :

                                                         1/3 + 2/9  × 3/4

Answer 1

\(\dfrac{1}{3}+\dfrac{2}{9}\times\dfrac{3}{4}=\dfrac{1}{3}+\dfrac{1}{6}=\dfrac{1}{2}\)

Answer 2

\(=\dfrac{1}{3}+\dfrac{2\times3}{9\times4}=\dfrac{1}{3}+\dfrac{1}{6}=\dfrac{2+1}{6}=\dfrac{3}{6}=\dfrac{1}{2}\)

Answer 3

\(\dfrac{1}{3}+\dfrac{2}{9}\times\dfrac{3}{4}=\dfrac{1}{3}+\dfrac{6}{36}=\dfrac{1}{3}+\dfrac{1}{6}=\dfrac{2}{6}+\dfrac{1}{6}=\dfrac{3}{6}=\dfrac{1}{2}\)

Answer 4

`(1)/(3)+(2)/(9)xx(3)/(4)`

`=(1)/(3)+(2xx3)/(3xx3xx2xx2)`

`=(1)/(3)+(1)/(3xx2)`

`=(1)/(3)+(1)/(6)`

`=(1xx2+1)/(6)=(3)/(6)=(1)/(2)`

Answer 5

\(\dfrac{1}{3}+\dfrac{2}{9}\times\dfrac{3}{4}=\dfrac{1}{3}+\dfrac{6}{36}=\dfrac{1}{3}+\dfrac{1}{6}=\dfrac{2}{6}+\dfrac{1}{6}=\dfrac{2+1}{6}=\dfrac{3}{6}=\dfrac{1}{2}\)

Answer 6

\(\dfrac{1}{3}+\dfrac{2}{9}x\dfrac{3}{4}=\dfrac{1}{3}+\dfrac{1}{6}=\dfrac{1}{2}\)

Answer 7

\(\dfrac{1}{3}+\left(\dfrac{2}{9}.\dfrac{3}{4}\right)=\dfrac{1}{3}+\dfrac{6}{36}=\dfrac{12}{36}+\dfrac{6}{36}=\dfrac{18}{36}=\dfrac{1}{2}\)