Question

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

Answer 1

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

\(=\frac{11.10}{2}=55\)

Answer 2

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

=(10+1).10÷2

=11.5

=55

Answer 3

1 + 2 + 3 + 4 + 5 + 6 + 7 + 8 + 9 

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

= 10 + 10 + 10 + 10 + 10 + 5 

= 10 x 5 + 5

= 50 + 5

= 55

Answer 4

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

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

= 11 + 11 + 11 + 11 + 11

= 11 x 5

= 55

Answer 5

Bằng 55

Answer 6

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

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

10+10+10+10+5=45

Answer 7

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

=10+10+10+10+15

=40+15

=55

Answer 8

1 + 2 + 3 + 4 + 5 + 6 + 7 + 8 + 9 + 10 = 55

Answer 9

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

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

=11+11+11+11+11+10

=65

Answer 10

quên;55

Answer 11

1+2+3+4+5+6+7+8+9+10=55