Question

[Minki 2k7]

Tính phép tính nhanh 

0+1+2+3+4+5+6+7+8+9+10

=..............................................

=.............................................

=..................................

Answer 1

[Kaori Miyazono]

\(0+1+2+3+4+5+6+7+8+9+10\)

\(=\frac{\left(0+10\right).11}{2}\)

\(=5.11\)

\(=55\)

Answer 2

[Penta Lê]

(0+10)+(1+9)+(2+8)+(3+7)+(4+6)+5

= 10+10+10+10+10+5

=10*5+5

=55