用边长30厘米的正方形地砖铺一段长12米，宽6米的人行道路面.
①至少需要多少块这样的地砖?
②如果地砖每平方米的售价是35元，那么购买地砖至少应花多少元?
解：① 12× 6÷( 0.3 × 0.3)
=72÷ 0.09
=800(块)
②12× 6× 35=2520(元)
答：至少需要 800 块这样的地砖，购买地砖至少应花2520元
暂无解析
-- She must be in red.
No, _____. She wears a green coat.
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