A=987654321×123456789 =987654321×(123456788+1) =987654321×123456788+987654321B=987654322×123456788 =(987654321+1)×123456788 =987654321×123456788+123456788∵987654321>123456788∴A>B
1×9=92×8=1616>9B>A
A大