a)-17+23=23-17=6
6+15=21
21-33=-12
-12+12=0
b)76-105=-29
-29+24=-5
-5-8=-13
-13-7=-20
c)-211+101=-110
-110+110=0
0-25=-25
d)136-128-8
8-8=0
0-12=-12
-12+13=1
Răspuns:
a) 0
b) -20
c) -25
d) 1
