Question

(90-81)+16-5+1+15-1-4

Answer 1

Resposta:

31

Explicação passo-a-passo:

(90-81)=9

9+16=25

25-5=20

20+1=21

21+15=36

36-1=35

35-4=31

Answer 2

Resposta:
(90-81)+16-5+1+15-1-4
9+16-5+1-15-1-4
25-5+1-15-1-4
25-6-15-1-4
19-5-1-4
14-1-4
13-4
9