(3+1)(3-1)

解答

(3 + 1) (3 - 1)

8

求解步骤

(3 + 1) (3 - 1)

遵循 PEMDAS 运算顺序

计算括号内的值

(3 + 1) : 4

3 + 1

3 + 1 = 4

= 4

= 4 (3 - 1)

计算括号内的值

(3 - 1) : 2

3 - 1

3 - 1 = 2

= 2

= 4 \cdot 2

乘除（左右）

4 \cdot 2 : 8

4 \cdot 2

4 \cdot 2 = 8

= 8

= 8

5 3^{2} - 6 3^{2}

6 \times 2 - 8 \div 2 + 6 + 2^{2}

2 (1)^{2} - 5 (1) - 3

- {(- 2 + 4) (5) - [- 3 (6 - 10)]}

- 0 - 3 - 4 - 16 - 4 - 0 - 12 - 12