有一个棱长为40厘米的正方体零件，它的上、下两个面的正中间各有一个直径为4厘米的圆孔，孔深为10厘米．试求这个零件的表面积．
直接写出得数= = = 3×== = = =8×= =
直接写出得数．= = = == ×+= ﹣= +=
直接写数对又快：1÷= += ÷= （﹣）×18=÷3= ×= ﹣= ×÷×=
5.8+3= ×= 6÷= 1÷﹣÷1= 2×10= 1÷3=0.66÷= 1÷1+= 9÷3= 1÷0.8= 5.4×= ×0.7+0.3=
直接写出得数．×1.2= 1÷2= 1.8÷= ×÷×=（+﹣）×12= 3﹣÷0.75= 24÷8= 4÷﹣÷4=
= 
= 
= 3×
=
= 
= 
= 
=
= 
=
= 
= 
= 
=
= 
×
+
= 
﹣
= 
+
=
= 
+
= 
÷
= （
﹣
）×18=
÷3= 
×
﹣
= 
×
÷
=
= 
×
= 6÷
= 1÷
﹣
÷1= 2
=
= 1
÷1+
÷3= 1
÷0.8= 5.4×
= 
×0.7+0.3=
×1.2= 1÷2
= 1.8÷
= 
×
÷
+
﹣
）×12= 3﹣
÷0.75= 24
÷8= 4÷
﹣
÷4=
粤公网安备 44130202000953号