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calculati:19+{12-[17-(3+7-2-1)]+1}dau coroana

Răspuns :

19+{12-[17-(3+7-2-1)]+1}=
19+{12-[17-(10-2-1)]+1}=
19+{12-[17-(8-1)]+1}=
19+[12-(17-7)+1]=
19+(12-10+1)=
19+(2+1)=
19+3= 22

/robèrtinni
19+{12-[17-(3+7-2-1)]+1}=19+{12-[17-(10-2-1)]+1}=19+{12-[17-7]+1}= 19+
{12-10+1}=19+{2+1}=19+3=22