4000-40^2-20*40-50

解答

4000 - 4 0^{2} - 20 \cdot 40 - 50

1550

求解步骤

4000 - 4 0^{2} - 20 \cdot 40 - 50

遵循 PEMDAS 运算顺序

计算幂值

4 0^{2} : 1600

4 0^{2}

4 0^{2} = 1600

= 1600

= 4000 - 1600 - 20 \cdot 40 - 50

乘除（左右）

20 \cdot 40 : 800

20 \cdot 40

20 \cdot 40 = 800

= 800

= 4000 - 1600 - 800 - 50

加减（左右）

4000 - 1600 - 800 - 50 : 1550

4000 - 1600 - 800 - 50

4000 - 1600 = 2400

= 2400 - 800 - 50

2400 - 800 = 1600

= 1600 - 50

1600 - 50 = 1550

= 1550

= 1550

15 - 8 - 2 \times 1 + 5 \times (4 - 12 \div 6)

6 + \frac{7}{9} \div \frac{4}{8}

4 - 15 + 19 - 2 (16 - 23)

(1 + (- 3)) \times 2

- 3 (4 + 3) \div 6 \times (- 2)