Question

[hello Đạt]

 

Answer 1

[Nguyễn Thị Thương Hoài]

a; A = 17 x (\(\dfrac{1313}{5151}\) + \(\dfrac{1111}{3434}\)) : \(\dfrac{177}{12}\)

   A = 17 x (\(\dfrac{13}{51}\) + \(\dfrac{11}{34}\)) : \(\dfrac{177}{22}\)

  A = 17 x \(\dfrac{59}{102}\) : \(\dfrac{177}{12}\)

A = \(\dfrac{59}{6}\) : \(\dfrac{177}{12}\)

A = \(\dfrac{2}{3}\)

Answer 2

[『Kuroba ム Tsuki Ryoo ︵²ᵏ⁷』]

`#3107.101107`

`a)`

`A = 17 \times (1313/5151 + 1111/3434) \div 177/12`

`= 17 \times (13/51 + 11/34) \div 177/12`

`= 17 \times 59/102 \times 12/177`

`= (17 \times 12/177) \times 59/102`

`= 68/59 \times 59/102`

`= 68/102 = 2/3`

Vậy, `A = 2/3`

`b)`

`B = 3/5 + 47/13 - 25/8 + 1/8 - 8/13 + 2/5`

`= (3/5 + 2/5) + (-25/8 + 1/8) + (47/13 - 8/13)`

`= 5/5 + (-24/8) + 39/13`

`= 1 - 3 + 3 = 1`

Vậy, `B = 1.`

`B =