Question

14 Calculaţi:
a 1+2 +3 +4 +5 +6 +7;
c7 + 14 +21+28 +35 +42;
b 10 + 20 + 30 + 40 + 50 + 60 +70;
d 11 + 12 +13 + 14 + 15 + 16 +17+18
Cu suma lui Gauss va rog!!

Answer 1

Răspuns:

a)1+2+3+4+5+6+7=28

c)7+14+21+28+35+42=147

b)10+20+30+40+50+60+70=280

d)11+12+13+14+15+16+17+18=116

Sper că team ajutat!!

Answer 2

Răspuns:

a) 1+2+3+4+5+6+7=3+7+11+7=10+18=28

b) 10+20+30+40+50+60+70=30+70+110+70=100+180 =280

c) 7+14+21+28+35+42=21+49+77=70+77=147

d) 11+12+13+14+15+16+17+18=23+27+31+35=50+66=116