Question

Calculati.10-9+8-7+...2-1+0=

Answer 1

1+1+1 de 5 ori
= 5+0 = 5

Answer 2

10-9+8-7+6-5+4-3+2-1

1+8-7+6-5+4-3+2-1

9-7+6-5+4-3+2-1

2+6-5+4-3+2-1

8-5+4-3+2-1

3+4-3+2-1

7-3+2-1

4+2-1

6-1=7