1小学数学说课稿大全（四年级下册）目录一、三角形的特性...........................................................................................................................2三、三角形内角和.........................................................................................................................10四、图形的拼组.............................................................................................................................13五、《小数加法和减法》(一)....................................................................................................16六、《小数加法和减法》(二)....................................................................................................17七、折线统计图.............................................................................................................................19八、植树问题.................................................................................................................................21九、围棋中的数学问题.................................................................................................................23十、四则混合运算.........................................................................................................................26十一、加法的运算定律.................................................................................................................30十二、简便计算.............................................................................................................................32十三、小数的产生和意义.............................................................................................................34十四、小数的读法和写法.............................................................................................................37十五、小数的性质.........................................................................................................................39十六、小数大小的比较.................................................................................................................42十七、小数点移动....................