将一个长12厘米，宽9厘米，高5厘米的长方体，切成两个长方体，两个长方体表面积的总和最多是多少平方厘米？最少是多少平方厘米？
直接写出得数．×=====+=== 5÷3==
直接写得数= 32×25%= 0.75+2.5= 3600÷30==×5= 0.32= 4×25﹣25= ×0.5=1 1÷10+0.9=（）×20==
直接写得数：+=÷= 1﹣5÷8=×=×= 0.9+99×0.9= 1÷0.6= 14÷35=÷×÷= 17.3÷1.73=
直接写出得数+=+=﹣0.125=﹣=+0.3= 10﹣=×=×=×= 10×=
口算：﹣=+=×= 25×10%=
×
=
=
=
=
=
+
=
=
= 5÷3=
=
= 32×25%= 0.75+2.5= 3600÷30=
=
×5= 0.32= 4×25﹣25=
）×20=
=
+
=
÷
= 1﹣5÷8=
×
×
=
÷
+
=
+
=
﹣0.125=
﹣
=
+0.3=
=
×
=
×
=
×
= 10×
=
﹣
=
+
=
×
= 25×10%=
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