30枚硬币由2分和5分的组成,共值9角9分,两种硬币各有多少?5u2Y1X2R(y3l7h3C
解:
算式:提示3K7m5d1l6`8^3D-\1R2i5u2Y1X2R(y3l7h3C
答:2分硬币有3T.\2S:x7@8V7F个,5分硬币有7D7p-s:N3b4_;^-u3l/K9C2`个。5u2Y1X2R(y3l7h3C