Question

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

Answer 1

1 + 2 + 3 + 4 + 5 + 6 + 7 + 8 + 9 

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

=   10 + 10 + 10 +10 + 5

=          45

Answer 2

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

Answer 3

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

k cho mik nha mn

Answer 4

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

Answer 5

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

k minh di minh k lai

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=45

k cho mik nha

Answer 7

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

=3+3+4+5+6+7+8+9

=6+4+5+6+7+8+9

=10+5+6+7+8+9

=15+6+7+8+9

=21+7+8+9

=28+8+9

=36+9

=45

Answer 8

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

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

= 10 + 10 + 10 + 10 + 5

= 45

Answer 9

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

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

=10+10+10+10+5

=40+5

=45 nha 

Sizuka

Answer 10

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

=[1+9]+[2+8]+[3+7]+[4+6]+5

=10+10+10+10+5

=45