15+15÷15×⊂15+15×15⊃ dau coroana

Răspuns :

15+15:15×(15+15×15)=
=15+1×(15+225)
=15+1×240
=15+240
=255
deci:
(15+225)x15÷15+15 =
240 + 15 =255