Question

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

Ai nhanh mình tích... 1 like

Answer 1

1 + 2 + 3 + 4 + 5 + 6 + 7 + 8 + 9 = 45

Answer 2

1+2+3+4+5+6+7+8+9=45

Answer 3

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

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

= 10 + 10 + 10 + 10 + 5

= 10 x 4 + 5

= 40 + 5

= 45

Answer 4

(1+9)((9-1)/1+1)/2=10.9/2=45

hok tốt

Answer 5

1+2+3+4+5+6+7+8+9=45

Answer 6

   1 + 2 + 3 + 4 + 5 + 6 + 7 + 8 + 9

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

= 10 + 10 + 10 + 10 + 5

= 10 x 4 + 5

= 40 + 5

= 45

Answer 7

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

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

= 10 + 10 + 10 + 10 + 5

=  10 x 4 + 5

= 40 + 5

= 45

Answer 8

1 + 2 + 3 + 4 + 5 + 6 + 7 + 8  + 9 = 45