+4+2+9+2+25+10+12+2+15-1

解

+ 4 + 2 + 9 + 2 + 25 + 10 + 12 + 2 + 15 - 1

80

解答ステップ

4 + 2 + 9 + 2 + 25 + 10 + 12 + 2 + 15 - 1

演算のPEMDAS順に従う

足して割る (左から右)

4 + 2 = 6

= 6 + 9 + 2 + 25 + 10 + 12 + 2 + 15 - 1

6 + 9 = 15

= 15 + 2 + 25 + 10 + 12 + 2 + 15 - 1

15 + 2 = 17

= 17 + 25 + 10 + 12 + 2 + 15 - 1

17 + 25 = 42

= 42 + 10 + 12 + 2 + 15 - 1

42 + 10 = 52

= 52 + 12 + 2 + 15 - 1

52 + 12 = 64

= 64 + 2 + 15 - 1

64 + 2 = 66

= 66 + 15 - 1

66 + 15 = 81

= 81 - 1

81 - 1 = 80

= 80