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杨老师在选修课《数学与生活》上耍了一个名叫“魔八方”的魔术 :把 8× 8的小方格纸板按图 1那样剪成四块 ,再把这四块纸板按图 2那样拼成一个5× 13的小方格长方形 .真奇怪 !怎么面积由原来的 64变成了 65呢 ? 图 1 8× 8方格 图 2 拼全后的长方形剪成四块这个
Ms. Yang played a magic named “Magic” in the elective “Mathematics and Life”: Cut 8 × 8 square cardboard into four pieces as shown in Figure 1, and then press these four cardboard pieces as shown in Figure 2 It’s like a 5×13 square rectangle. It’s strange! How did the area change from the original 64 to 65? Figure 1 8×8 grid Figure 2 After the spell, the rectangle was cut into four pieces.