Răspuns:
8.
a)+7-5-4+6+(+1-5+7-4)=
=+7-5-4+6-1=
=+3
b)+2-8-7+4-(+3-6+2-0)=
=+2-8-7+4-1=
=-10
9.
a)+9-6+[+4-8+1+(+4-3+5-1)=
=+9-6+(+4-8+1+5)=
=+9-6-2=
=+1
b)+3-6-[-1+5+7+(-4+8+9+5)=
=+3-6-(-1+5+7+18)=
=+3-6-29=
=-32
10.
a)+21-38+[-44+25+88+(-50+36)=
=+21-38+(-44+25+88-4)=
=+21-38+65=
=+48
b)+71-58+[-35-49+23-(+82+35-75)]=
=+71-58+(-35-49+23-42)=
=+71-58-103=
=-90
11.
a)+121-549+[-448+252+(+837+314+289)=
=+121-549+(-448+252+1440)=
=+121-549+1244=
=+816
b)+439-627-[-368+308-(-845+97)=
=+439-627-(-368+308-748)=
=+439-627-808=
=-996
Sper ca te-am ajutat!
