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Cat este 4+4X5-9\4+9+9

Răspuns :

=4+20-2 rest 1+9+9
=24-2 rest 1 +9+9
=22 rest 1 + 9 + 9
=31 rest 1 + 9
-40 rest 1
4+20-2,25+9+9=
=24-2,25+18=
=21,75+18=
=39,75