Question

[Hồ Vĩnh Khoa]

Tính nhanh:

3 - [2/4 x 1/2 + 2/4 x 3/2 + 24/8 x 2/4 + 2/4]

Answer 1

[Nguyễn Thị Thương Hoài]

   3 - [ \(\dfrac{2}{4}\) \(\times\) \(\dfrac{1}{2}\) + \(\dfrac{2}{4}\) \(\times\) \(\dfrac{3}{2}\) + \(\dfrac{24}{8}\) \(\times\)\(\dfrac{2}{4}\) + \(\dfrac{2}{4}\)]

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

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

= 3 - \(\dfrac{1}{2}\) \(\times\) 6

= 3 - 3

= 0