Question

Ex 7,8 Pls cu rezolvarea completă ​

Answer 1

7.
a)7-3+(-3)+1=4-3+1=1+1=2
b)-4+2+9-7=-2+2=0
c)3+1-6+3=4-3=1
d) 8+3-5-4+2=11-9+2=2+2=4
e)-6-9+3-1+1=-15+3=-12

8.
a)-(-2)+(-3)-(-8)=2-3+8=7
b)(-2)-(+3)+(-3)=-2-3-3=-8
c)5+3+7-(-4)+1=15+4+1=20
d)-6+8-8+6=0
e)3-3-(-2)+9=3-3+2+9=11
f)12-7-1-(-7)=12-7-1+7=11