Question

[Đỗ Lệ Huyền]

bài 1

27/23+5/21-4/23+16/21+1/2

3/2-5/6:(1/2)^2+ căn bậc 2 4

Answer 1

[Fa Châu De]

Bài 1:

a, Ta có: \(\dfrac{27}{23}+\dfrac{5}{21}-\dfrac{4}{23}+\dfrac{16}{21}+\dfrac{1}{2}\)

= \(\left(\dfrac{27}{23}-\dfrac{4}{23}\right)+\left(\dfrac{5}{21}+\dfrac{16}{21}\right)+\dfrac{1}{2}\)

=\(\dfrac{23}{23}+\dfrac{21}{21}+\dfrac{1}{2}\) = \(1+1+\dfrac{1}{2}\)

= \(2\dfrac{1}{2}\)

Answer 2

[Đỗ Lệ Huyền]

câu b làm đc ko bạn