19+2-10+15-12+15-12+7

解答

19 + 2 - 10 + 15 - 12 + 15 - 12 + 7

24

求解步骤

19 + 2 - 10 + 15 - 12 + 15 - 12 + 7

遵循 PEMDAS 运算顺序

加减（左右）

19 + 2 = 21

= 21 - 10 + 15 - 12 + 15 - 12 + 7

21 - 10 = 11

= 11 + 15 - 12 + 15 - 12 + 7

11 + 15 = 26

= 26 - 12 + 15 - 12 + 7

26 - 12 = 14

= 14 + 15 - 12 + 7

14 + 15 = 29

= 29 - 12 + 7

29 - 12 = 17

= 17 + 7

17 + 7 = 24

= 24

19 - 4 \div 2 \times 5 - 7

0 - 1 - 1

1 2^{2} - 4^{3} + 4^{2}

6 - 2 \times (1 - 3)

- 2 (3)^{2} + 7 (3) + 5