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calculati folosiind factorul comun 23x54+54x77=
99x999+99=
2x998+98x998=
509x14+9x14-500x14=
DAUU COROANAAAAAA ​


Răspuns :

Răspuns:

54×(23+77)=5400

998×(2+98)=99800

14×(509+9-500)=252