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“植树问题”是人教版教材四年级下册“数学广角”中的教学内容,有线段上植树和封闭图形植树两类问题,其中线段上植树通常包括下列三种情况,即两端都植;两端都不植;只在一端植,另一端不植。这一教学内容的难点在于让学生根据实际情况具体分析和判断来解决“植树问题”。针对“数学广角”的教学内容,教师要渗透对应与数形结合的数学思想,让学生能够
“Tree planting problem” is the teaching content in the fourth grade of the PEP textbook “Mathematics Wide Angle”. There are two kinds of problems in planted tree planting and enclosed graph planting in the line segment. Tree planting on the segment usually includes the following three situations Both ends of the plant; both ends of the plant; only plant at one end, the other end is not planted. The difficulty of this teaching content is to allow students to solve the “tree planting problem” according to the actual situation of specific analysis and judgment. In view of the teaching content of “Wide Angle of Mathematics”, teachers should infiltrate the mathematical ideas corresponding to the combination of numbers and forms so that students can