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afla sumele adunarilor repetate in care se repeta  de 3 ori ca termen numarul .. 4,2,8,5,10,11,30.

Răspuns :

3×4=4+4+4
=12
3×2=2+2+2
=6
3×8=8+8+8
=24
3×5=5+5+5
15
3×10=10+10+10
=30
3×11=11+11+11
=33
3×30=30+30+30
=90