五年级找规律题 五年级上册找规律
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\u6709\u51e0\u4e2a\u662f\u9ed1\u7684\uff1f 11.
=8
=16
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33\u4e2a\u56fe\u5f62\uff0c33/3=11\uff08\u7ec4\uff09 \u4e09\u89d2\u5f62\uff1a11*2=22\uff08\u4e2a\uff09 \u5706\u5f62\uff1a33-22=11\uff08\u4e2a\uff09
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2面图红色的小正方体分别是：12、 24、 36 96
12*1 12*2 12*3
12*(3-2) 12*(4-2) 12*(5-2) 12*(10-2)
1面图红色的小正方体分别是：6、 24、 54 384
(9-8)*6 (16-12)*6 (25-16)*6 (100-36)*6
没有涂红色的小正方体分别是：1、 8、 27 512
(3-2)^3 (4-2)^3 (5-2)^3 (10-2)^3
我知道了。设边长为n(虽然题目给的是厘米而问的是10分米，但是切的同样是10等分，所以不用管单位)，切开之后的小块一共有4种情况：0面有红色A个，1面有红色B个，2面有红色C个，3面有红色D个。其中3面有红色的固定是8个顶点，所以固定是D=8。2面有红色的规律是C=(n-2)×12。0面有红色的规律是A =(n-2)^3。最后2面有红色的个数B=n^3-A-C-D。所以答案就是：0面的有512个。1面的有384个。2面的有96个。3面的有8个。手机打字累死啦，希望能帮到你。(^-^)
设大正方体棱长/小正方体=n
3面有8个
2面有12*(n-2)=12n-24个
1面有(n-2)^2*6=6n^2-24n+24个
0面有(n-2)^3=n^3-6n^2+12n-8个
8个
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