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calculeaza tinand cont de ordinea efectuari operatiilor
 15:3+7=            6-9:3=              20+3:3=
8+21:3=            10-3:1=             18:3-6=
16-27:3=           24:3+2=             21:3+7=


Răspuns :

15:3+7=12;
6-9:3=3;
20+3:3=21;
8+21:3=15;
10-3:1=7;
18:3-6=0;
16-27:3=7;
24:3+2=10;
21:3+7=14.