一双筷子有2根，4双筷子有多少跟？0F3z;y2V6H0c(o,N8j,x2z1e;U
算式：提示/M:_'t;[7_+Y3a*s9l:E0F3z;y2V6H0c(o,N8j,x2z1e;U
答；4双筷子有'z*p1O'e0g6b.u8y6Q根0F3z;y2V6H0c(o,N8j,x2z1e;U