Question

Spune daca propozitiile de mai jos sunt adevarate.
(a).Daca a-b=3 784, atunci (a+1 720)-(b+1 720)=3 784
(b).Daca a-b=2 715, atunci (a-820)-(b-820)=2 715
(c).Daca a-b=1 214, atunci (a+500)-(b-500)=1 214 

Answer 1

a)a-b=3784
a+1720-b-1720=3784
a-b=3784 adevarat
b)a-b=2715
a-820-b+820=2715
a-b=2715
adevarat deoarece -820+820=0
c)a-b=1214
a+500-b+500=1214
a-b+1000=1214
a-b=1214-1000
a-b=214 fals