Question

[Vinh Doan]

Tính nhanh 

54 chia 3 mũ 1 cộng 6 nhân 5 mũ 2 

11 - 13 + 15 -17 + 19 - 21 + 23 - 25

Answer 1

[Sahara]

\(54:3^1+6.5^2\)
\(=54:3+6.25\)
\(=18+150\)
\(=168\)
\(---------\)
\(11-13+15-17+19-21+23-25\)
\(=\left(11-13\right)+\left(15-17\right)+\left(19-21\right)+\left(23-25\right)\)
\(=\left(-2\right)+\left(-2\right)+\left(-2\right)+\left(-2\right)\)
\(=\left(-2\right).4\)
\(=-8\)

Answer 2

[Vinh Doan]

mn giúp min bài này vs ạ