Question

[Hồ Ngọc Ánh]

tính nhanh 

2000 - 40 x 27 - 40 x 23

Answer 1

[『Kuroba ム Tsuki Ryoo ︵²ᵏ⁷』]

`@` `\text {Ans}`

`\downarrow`

`2000 - 40 \times 27 - 40 \times 23`

`= 2000 - 40 \times (27 + 23)`

`= 2000 - 40 \times 50`

`= 40 \times 50 - 40 \times 50`

`=0`

Answer 2

[Nguyễn Nhân Dương]

\(2000-40x27-40x23\)

\(=40x50-\left(40x27+40x23\right)\)

\(=40x50-\left[40x\left(27+23\right)\right]\)

\(=40x50-40x50=0\)