Question

?????????? alguém sabee​

Answer 1

Resposta:

d) 18-(-12+3-7-4)-1

18-(-23+3)-1

18-(-20)-1

18+20-1

38-1

37

e)17-[-5-(+2-5)+3]+1

17-[-5-(-3)+3]+1

17-[-5+3+3]+1

17-[-5+6]+1

17-[1]+1

17-1+1

17

f) 20-{-2+[1+(+9-5)-2]+15-9}

20-{-2+[1+4-2]+15-9}

20-{-2+3+15-9}

20-{-11+18}

20 -7

13

Bons estudos ❤