如图的两个正方形，边长分别为8厘米和4厘米，那么阴影部分的面积是7~7z.p:H,c:R(B9r)A/O平方厘米。:\1n8x.~;~)O-P.~
:\1n8x.~;~)O-P.~
算式：提示7|,S/s3L8W/R1G5`0`:\1n8x.~;~)O-P.~
答：阴影的面积是;B1G2l(G4j1[平方厘米。:\1n8x.~;~)O-P.~