1+1+2+3+4+5+6+7+8+9+0​

Răspuns :

facem asa:

1+1+2+3+4+5+6+7+8+9+0

1+1= 2

2+2 = 4

4+3= 7

7+4=11

11+5=16

16+6=22

22+7=29

29+8=37

37+9=46

si daca adaugam 46 cu 0 tot da 46

Răspuns:

[tex]1 + 1 + 2 + 3 + 4 + 5 + 6 + 7 + 8 + 9 + 0 \\ 2 + 5 + 9 + 13 + 17 + 0 \\ 7 + 22 + 17 \\ 29 + 17 \\ 46[/tex]