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proba adunarii si scaderii

Răspuns :

a + b = c proba: c - a = b, c - b = a 
a - b = c  proba b + c = a, a - c = b 
Sper ca te-am ajutat 

[tex]T1+T2=S[/tex]
[tex]Proba~adunarii=S-T2=T1,~~S-T1=T2[/tex]
[tex]Exemple:1+5=6,~6-5=1,~6-1=5[/tex]

[tex]T1-T2=S[/tex]
[tex]Proba~scaderii=S+T2=T1,~~T1-S=T2[/tex]
[tex]Exemple:5-2=3,~~3+2=5,~~5-3=2[/tex]