Question

Tính nhanh

5/12 * 3/7 + 5/12 *4/7

Answer 1

\(\dfrac{5}{12}\times\dfrac{3}{7}+\dfrac{5}{12}\times\dfrac{4}{7}\\=\dfrac{5}{12}\times\left(\dfrac{3}{7}+\dfrac{4}{7}\right)\\ =\dfrac{5}{12}\times\dfrac{7}{7}\\ =\dfrac{5}{12}\)

Answer 2

`5/12 xx 3/7+5/12 xx 4/7`

`=5/12 xx (3/7+4/7)`

`=5/12 xx 1`

`=5/12`

Answer 3

\(=\dfrac{5}{12}\times\left(\dfrac{3}{7}+\dfrac{4}{7}\right)=\dfrac{5}{12}.1=\dfrac{5}{12}\)

Answer 4

\(\dfrac{5}{12}\times\dfrac{3}{7}+\dfrac{5}{12}\times\dfrac{4}{7}\\ =\dfrac{5}{12}\times\left(\dfrac{3}{7}+\dfrac{4}{7}\right)\\ =\dfrac{5}{12}\times1\\ =\dfrac{5}{12}\)

Answer 5

` 5/12 xx 3/7 + 5/12 xx 4/7 `

 

`=5/12 xx ( 3/7 + 4/7 ) `

 

`= 5/12 xx 1 = 5/12`

Answer 6

5/12*(3/7+4/7)=5/12*1=5/12