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12/2+24/3+7*2*4-9*2/3= rezolvare prin ordinea operatiilor [5*7+14/2] /[ 45/5-21/3]=

Răspuns :

12:2+24:3+7x2x4-9x2:3=
6+8+56-6=
14+56-6=
70-6=64
b) [5x7+14:2]:[45:5-21:3]
[35+7]:[9-7]=
42:2=21