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cum rezolv problemele:
41-42:7-23??
63+63:9+15????


Răspuns :

41-42:7-23
=41-6-23
=35-23
=12
63+63:9+15
=63+7+15
=70+15
=85
41-6-23=35-23=12.
63+7+15=70+15=85