4.98*(99+1)=4.98*100=498
4.98*99+4.98=4.98*(99+1)=4.98*100=498
4.98x99+4.98=4.98x(99+1)=4.98x100=498
4.98×(99+1)=498
4.98*99+4.98=4.98*(99+1)=4.98*100=498