数学题：一块长26dm，宽20dm的长方形红布，裁剪成直角边都是2dm的等腰直角三角形红旗，最多可做多少面小三角旗？

数学题解答：

Melody解答:

大长方形：26*20=520平方分米

小正方形：2*2=4平方分米；

520÷4=130（个）；

每一个小正方形都可以分成两个边长为2分米的等边直角三角形：

130*2=260（个）

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