8-(20-(20))-(40-(30))

解答

8 - (20 - (20)) - (40 - (30))

- 2

求解步骤

8 - (20 - (20)) - (40 - (30))

遵循 PEMDAS 运算顺序

计算括号内的值

(20 - (20)) : 0

20 - (20)

20 - (20) = 0

= 0

= 8 - 0 - (40 - (30))

计算括号内的值

(40 - (30)) : 10

40 - (30)

40 - (30) = 10

= 10

= 8 - 0 - 10

加减（左右）

8 - 0 - 10 : - 2

8 - 0 - 10

8 - 0 = 8

= 8 - 10

8 - 10 = - 2

= - 2

= - 2

36 \div 4 + 8 (3 + 9)

(48 \div 4) + (5 \times 2) - 9

- 2 [- 6 [- 9 (4 \times (- 7))]]

40 \div (- 2) + 9

6^{3} - (3^{3} + 4^{2})