10+11-5-1+7-2

解答

10 + 11 - 5 - 1 + 7 - 2

20

求解步骤

10 + 11 - 5 - 1 + 7 - 2

遵循 PEMDAS 运算顺序

加减（左右）

10 + 11 = 21

= 21 - 5 - 1 + 7 - 2

21 - 5 = 16

= 16 - 1 + 7 - 2

16 - 1 = 15

= 15 + 7 - 2

15 + 7 = 22

= 22 - 2

22 - 2 = 20

= 20

(7 - 5) (3 - 2 - 4 \div 2 - 3 (6 - 2 - 8 \div 4))

1 7^{2} - 64

578 - 245 + 5 + 34 \times 3

5 \times 2^{3} - (- 2)^{5} - (- 2)^{2} + (- 1)^{7}

81 \div 9 - (3 \times 4 \times 5) + 64 - 32 \div 4