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pune semnele +,-,x
4□(25□4)=(4□25)□(4□5)
7□(80□60)=7□20
(23□4)□(7□4)=(23□7)□4
Ajutor!!!
DAU COROANA!!!!


Răspuns :

4x (25+4)=(4x25)+(4x5)
7x (80-60)=7x29
(23x4)+(7x4)=(23+7)x4
4 x (25+4) = (4x25) + (4x5)
7 x (80-60) = 7 x 20
23 x 4 + 7x4 = (23+7) x 4