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a fost răspuns

Va rog frumos e urgent !

Grupeaza convenabil termenii, apoi calculeaza :

a) 16+12+24+18;

b) 9+25+35+21;

c) 1+2+3+4+5+...+9+10+11+12;

d) 17+18+19+3+2+1;

e) 22+33+18+17.

Răspuns :

Iontitu
a) 16+12+24+18=16+24+18+12=30+30=60
b) 9+25+35+21=9+21+25+35=30+60=90
e) 22+33+18+17=22+18+33+17=40+50=90
d) 17+18+19+3+2+1=17+3+18+2+19+1=20+20+20=60
c) 1+2+3+4+5+...+9+10+11+12=1+9+2+8+3+7+4+6+5+10+11+12=10+10+10+10+15+23=78

Alte intrebari