解:0.625*0.5+5/8+1/2*(5/8)=5/8*(1/2)+5/8+1/2*(5/8)=5/8*(1/2+1/2)+5/8=5/8+5/8=5/4=1.25
0.625X0.5+5/8+1/2X5/8=5/8X(0.5+1+0.5)=5/8X2=5/4=1又4分之1