用27个棱长1厘米的小正方体拼成一个长方体,拼成的长方体的表面积最大是,最小
\u75284\u4e2a\u68f1\u957f\u4e3a2\u5398\u7c73\u7684\u6b63\u65b9\u4f53\u62fc\u6210\u4e00\u4e2a\u957f\u65b9\u4f53,\u600e\u4e48\u62fc,\u957f\u65b9\u4f53\u7684\u8868\u9762\u79ef\u6700\u5c0f?\u60f3\uff1a\u8868\u9762\u79ef\u6700\u5c0f\uff0c\u85cf\u8d77\u6765\u7684\u9762\u8d8a\u591a\u3002\u62fc\u6210\u63a5\u8fd1\u6b63\u65b9\u4f53\u6700\u4f73\u3002
\u6bcf\u6392\u64462\u4e2a\uff0c\u64462\u6392\uff0c\u51cf\u5c118\u4e2a\u9762\u3002
\u64461\u6392\uff0c\u62fc3\u6b21\u51cf\u5c116\u4e2a\u9762
\u8868\u9762\u79ef\u6700\u5c11\uff1a2\u00d72\u00d7\uff086\u00d74\uff0d8\uff09\uff1d64\u5e73\u65b9\u5398\u7c73
\u6b63\u65b9\u4f53\u6bcf\u4e2a\u9762\u7684\u9762\u79ef\u662f\uff1a4*4=16\u5e73\u65b9\u5398\u7c73
\u62fc\u6210\u957f\u65b9\u4f53\u540e\u603b\u5171\u6709\u539f\u6765\u6b63\u65b9\u4f53\u7684\u97623*6-2*2=14\u4e2a
\u6240\u4ee5\u8868\u9762\u79ef=16*14=224\u5e73\u65b9\u5398\u7c73
\u539f\u6bcf\u4e2a\u6b63\u65b9\u4f53\u7684\u4f53\u79ef=4*4*4=64 \u7acb\u65b9\u5398\u7c73
\u6240\u4ee5\u957f\u65b9\u4f53\u7684\u4f53\u79ef 3*64=192 \u7acb\u65b9\u5398\u7c73
27×4+2=108+2=110平方厘米
3×3×6=54平方厘米
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