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本册的建(用)模点大致为:第一单元的长度单位厘米模型的应用与整理、长度单位毫米、分米、千米的模型、长度单位之间的进率、长度单位之间的互化:第二单元的加减法验算的一般方法模型:第三单元的平面图形、平行四边形、周长的概念模型;第四单元的余数的概念模型、余数与除数的关系模型、有余数除法的计算方法模型:第五单元的秒的模型、60
The construction of this book (use) modal point is roughly: The first unit length unit centimeter model application and finishing, length unit millimeter, decimeter, km model, the unit of length between the unit of rate, length Interchange: The second unit of the addition and subtraction method of checking the general method of calculation: the third unit of planar graphics, parallelogram, perimeter concept model; the fourth unit of the conceptual model of the remainder, the relationship between the remainder and the divisor model, the remainder The division of the calculation method model: the fifth unit of the second model, 60