小学四年级课本全练习的一道题:35除以12加36除以12加37除以12。以递归方程的形式写出巧妙的计算。
35/12+36/12+37/12
=(35+36+37)/12分布规律
=(36-1+36+36+1)/12
=(36+36+36)/12
=(3*36)/12
=3*(36/12)交换律
=3*3
=9
=(35+36+37)/12分布规律
=(36-1+36+36+1)/12
=(36+36+36)/12
=(3*36)/12
=3*(36/12)交换律
=3*3
=9