-2+4-8+16-32+64

解答

- 2 + 4 - 8 + 16 - 32 + 64

42

求解步骤

- 2 + 4 - 8 + 16 - 32 + 64

遵循 PEMDAS 运算顺序

加减（左右）

- 2 + 4 = 2

= 2 - 8 + 16 - 32 + 64

2 - 8 = - 6

= - 6 + 16 - 32 + 64

- 6 + 16 = 10

= 10 - 32 + 64

10 - 32 = - 22

= - 22 + 64

- 22 + 64 = 42

= 42

- 5 - (- 15) \div 5

8^{2} \div (42) - 3 + 5 (\frac{1}{5})

9 \times 8 + 6 \times 8

1 + 8 (33 - 1)

6^{3} - 10 \div 5