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今天的数学课外作业是两道趣味题,第一题是:一块正方形地,沿四周每隔8米种一棵树,一共种了100棵。又知这块地里种的玉米共收获28吨,平均每公顷收获玉米多少吨?罗佳读完题目,脑海中出现一幅情景图:一块正方形地,四周都种上了树,整整齐齐,轻风吹来,小树微微摇摆,好像是在招呼人呢!借助这幅图,罗佳再思考。这块正方形地,四周一共种了100棵树,每边就是种了100÷4=25(棵)树。由于是四周都种上了树,因而可以想象出四个角上都种上了树,因此有25
Today’s math homework is two interesting topics, the first question is: a square, along the circumference of every 8 meters planted a tree, planted a total of 100. Also know that this kind of corn in the ground were harvested a total of 28 tons, the average number of tons of corn per hectare harvest? Luo Jia read the title, a scene appears in my mind: a square, surrounded by planting trees, neat , Breeze blowing, small tree swaying, it seems to be greeting people too! With this picture, Luo Jia rethink. This square, surrounded by a total planted 100 trees, each side is planted 100 ÷ 4 = 25 (tree) tree. Since we planted trees on all sides, we can imagine that we planted trees on all four corners so we had 25