Question

Biểu thức: 13/7 x 12/13 + 13/7 x 27/13 có kết quả là :

Answer 1

`13/7 xx 12/13 + 13/7 xx 27/13`

`= 13/7 xx (12/13 + 27/13)`

`= 13/7 xx 3`

`= 39/7`

Answer 2

39/17

Answer 3

5\(\dfrac{4}{7}\)

Answer 4

13/7.(12/13+27/13)

=13/7.3

=39/7

Answer 5

39/7 nha viết nhầm thêm số 1

Answer 6

39/17

Answer 7

\(\dfrac{13}{7}\times\dfrac{12}{13}+\dfrac{13}{7}\times\dfrac{27}{13}\)

 \(=\dfrac{13}{7}\times\left(\dfrac{12}{13}+\dfrac{27}{13}\right)\)

 \(=\dfrac{13}{7}\times\dfrac{39}{13}\)

 \(=\dfrac{13}{7}\times3\)

 \(=\dfrac{39}{7}\)