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Efectuează : 30 -24:3ori(72:9-2ori3):8ori9

Răspuns :

6÷3×(8-6)÷8×9
6÷3×2÷8×9
72
30-24:3*(72:9-2*3):8*9=
30-24:3*(8-6):8*9=
30-24:3*2:8*9=
30-8*2:8*9=
30-16:8*9=
30-2*9=
30-18= 12