Răspuns :

Răspuns:

2+4+6+...+50

50×51÷2

25×51=1275

➪2+4+6+......+50

➪50•51:2 (suma lui Gauss)

➪2.550:2

➪1.275

➪Sᴘᴇʀ ᴄᴀ̆ ᴛᴇ-ᴀᴍ ᴀᴊᴜᴛᴀᴛ, sᴜᴄᴄᴇs シ