20\div 2× (14-12)

解答

20 \div 2 \times (14 - 12)

20

求解步骤

20 \div 2 \times (14 - 12)

遵循 PEMDAS 运算顺序

计算括号内的值

(14 - 12) : 2

14 - 12

14 - 12 = 2

= 2

= 20 \div 2 \times 2

乘除（左右）

20 \div 2 \times 2 : 20

20 \div 2 \times 2

20 \div 2 = 10

= 10 \times 2

10 \times 2 = 20

= 20

= 20

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

(9 - 3) \times 2 \div 6

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

4 + 3^{2} \cdot 2

\frac{4}{4 ^{2} + 16}