,1块1块地数,共20块。,2块2块地数,共20块。,4块4块地数,共20块。,5块5块地数,共20块。,10块10块地数,共20块。,1块1块地数,共20块。,2块2块地数,共20块。,4块4块地数,共20块。,5块5块地数,共20块。,10块10块地数,共20块。,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,1块1块地数,数了20次,2,4,6,8,10,12,14,16,18,20,2块2块地数,数了10次,4,8,12,16,20,4块4块地数,数了5次,5,10,15,20,5块5块地数,数了4次,10,20,10块10块地数,数了2次,每行有 块,有 行,一共有 块。,每列有 块,有 列,一共有 块。,5,5,5,15,块,3,3,3,15,块,3,3,3个5相加,5个3相加,4,5,20,4+4+4+4+4=20(块),5个4相加,10,3,30,(1)10+10+10=30(个),3个10相加,3,10,30,(2)3+3+3+3+3+3+3+3+3+3=30(个),10个3相加,5,3,15,5,5,5,15,格,3,4,12,3,3,3,3,12,格,3个5相加,4个3相加,