=(1+9)+(2+8)+(3+7)+(4+6)+5
= 10 + 10 + 10 + 10 +5
= 45x1234
=5530
1+2+3+4+5+6+7+8+9*1234=1+2+3+4+5+6+7+8+11106=11142
1 + 2 + 3 + 4 + 5 + 6 + 7 + 8 + 9 x 1234
=1+2+3+4+5+6+7+8+11106
=1+(2+8)+(3+7)+(4+6)+5+11106
=1+ 10 + 10 + 10 +5+11106
= 11136
1 + 2 + 3 + 4 + 5 + 7 + 8 + 9 x 1234
= 1 + 2 + 3 + 4 + 5 + 6 + 7 + 8 + 11106
= ( 1 + 5 + 11106 ) + ( 2 + 8 ) + ( 3 + 7 ) + ( 4 + 6 )
= 11112 + 10 + 10 + 10
= 11122 + 10 +10
= 11132 + 10
= 11142 .