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受欢迎的初等代数 >

(7-5)+(13-4)-(17+3)+(18-9)

解答

(7 - 5) + (13 - 4) - (17 + 3) + (18 - 9)

解答

0

求解步骤

(7 - 5) + (13 - 4) - (17 + 3) + (18 - 9)

遵循 PEMDAS 运算顺序

计算括号内的值

(7 - 5) : 2

7 - 5

7 - 5 = 2

= 2

= 2 + (13 - 4) - (17 + 3) + (18 - 9)

计算括号内的值

(13 - 4) : 9

13 - 4

13 - 4 = 9

= 9

= 2 + 9 - (17 + 3) + (18 - 9)

计算括号内的值

(17 + 3) : 20

17 + 3

17 + 3 = 20

= 20

= 2 + 9 - 20 + (18 - 9)

计算括号内的值

(18 - 9) : 9

18 - 9

18 - 9 = 9

= 9

= 2 + 9 - 20 + 9

加减（左右）

2 + 9 - 20 + 9 : 0

2 + 9 - 20 + 9

2 + 9 = 11

= 11 - 20 + 9

11 - 20 = - 9

= - 9 + 9

- 9 + 9 = 0

= 0

= 0

流行的例子

5^{2} + 2^{5} + 4^{2}

2 (2) + 5

3 (1) - 5

6 - \frac{1}{2} + \frac{1}{4}

2 - \frac{1}{3} - \frac{1}{2}