Răspuns:
Explicație pas cu pas:
[tex]\bf - 10 + (+ 12) = -10 + 12 = \red{\underline{~2~}}[/tex]
[tex]\bf +17+(-21)=+17-21=\purple{\underline{-4}}[/tex]
[tex]\bf -10+(-12)=-10-12=\blue{\underline{-22}}[/tex]
[tex]\bf +17+(+21)=+17+21=\pink{\underline{~38~}}[/tex]
[tex]\bf (-1)+(-2)+(+3)=-1-2+3=\red{\underline{~0~}}[/tex]
==pav38==
