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rezolvati exercitiul;
[90+(90+50)+(90-30)]×9=
va rog repede si bine


Răspuns :

[90+(90+50)+(90-30)]×9=[90+140+60]× 9=290×9=2610
[90+(90+50)+(90-30)] x9=2610
1)90+50=140;
2)90-30=60;
3)140+60=200;
4)200+90=290;
5)290x9=2610;


Sper ca te-am ajutat :)!!!