👤

4*9-21:7*8+18=
{2+[3+2*(3-1)]:7}:3+9=


Răspuns :

4·9-21:7·8+18=36-3·8+18=30
{2+[3+2*(3-1)]:7}:3+9=(2+1):3+9=10
4×9-21:7×8+18=30 {2+[3+2×(3-1)]:7}:3+9=10