ajutor repede. dau coroana sa fie 2 care raspund.zice asa. ex 7 daca as avea de 9 ori mai putine caise, as avea 7 . cate caise am? ex 8 daca asi fi cules de 8 ori mai multi chiocei, as fi avut 4. ex 4 zice . respecteaza ordinea efectuari operatilor. 100-42:6x9-6x5:10 , 25 +54:6:3x10-49:7x4 =??

Răspuns :

Ex 7
9x7 = 63

Ex 4
100-42:6x9-6x5:10
=100-7x9-6x5:10
=100-63-6x5:10
=100-63-3
=34

25+54:6:3x10-49:7x4
=25+9:3x10-49:7x4
=25+30-7x4
=25+30-28
=27