Relax

Respuesta :

Answer:

55

Step-by-step explanation:

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

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

= 10x5 + 5

= 55

Answer:

55

Step-by-step explanation:

caculator