17-2^2+8

解答

17 - 2^{2} + 8

21

求解步骤

17 - 2^{2} + 8

遵循 PEMDAS 运算顺序

计算幂值

2^{2} : 4

2^{2}

2^{2} = 4

= 4

= 17 - 4 + 8

加减（左右）

17 - 4 + 8 : 21

17 - 4 + 8

17 - 4 = 13

= 13 + 8

13 + 8 = 21

= 21

= 21

\frac{- 8 ^{2} + 3 ( - 8 )}{4 ( - 8 ) + 27}

2280 - 1500 - 850 - 680

4^{3} \div ((28 - 3^{3}) + 121 \div 1 1^{2})^{3}

- 2 (1)^{2} + 8 (1) - 5

- 2^{2} - 2 \cdot (- 2) - 3