-3+4+8+3+9-5+2-8-5-1+7

解

- 3 + 4 + 8 + 3 + 9 - 5 + 2 - 8 - 5 - 1 + 7

11

解答ステップ

- 3 + 4 + 8 + 3 + 9 - 5 + 2 - 8 - 5 - 1 + 7

演算のPEMDAS順に従う

足して割る (左から右)

- 3 + 4 = 1

= 1 + 8 + 3 + 9 - 5 + 2 - 8 - 5 - 1 + 7

1 + 8 = 9

= 9 + 3 + 9 - 5 + 2 - 8 - 5 - 1 + 7

9 + 3 = 12

= 12 + 9 - 5 + 2 - 8 - 5 - 1 + 7

12 + 9 = 21

= 21 - 5 + 2 - 8 - 5 - 1 + 7

21 - 5 = 16

= 16 + 2 - 8 - 5 - 1 + 7

16 + 2 = 18

= 18 - 8 - 5 - 1 + 7

18 - 8 = 10

= 10 - 5 - 1 + 7

10 - 5 = 5

= 5 - 1 + 7

5 - 1 = 4

= 4 + 7

4 + 7 = 11

= 11