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Efectuati: 7×2-(3+1)+28:4

Răspuns :

7x2-(3+1)+28:4=
14-4+7=
10+7=17

succes!!
= 7 x 2 - 4 + 28 : 4
= 14 - 4 + 28 : 4
= 14 - 4 + 7
= 10 + 7
= 17