Question

d)-20-(7+4-6-3)-1+2)=

Answer 1

-20-(7+4-6-3)-1+2
-20-(11-9)+1
-20-(2)+1
-20-2+1
-22+1
-21

Answer 2

Boa tarde Laura!

Solução!

$-20-(7+4-6-3)-1+2 \\\\ -20-(11-9)-1+2\\\\ -20-11+9-1+2 \\\\ -20-11-1+9+2 \\\\ -20-11-1+11\\\\ -32+11=-21$

Boa tarde!
Bons estudos!