表内除法乘法口诀.ppt

单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,*,表内除法乘法口诀,1,(,1,),12,个桃，每只小猴分,3,个，可以分给几只小猴,?,12,3,=,想,:3,和几相乘得,12?,三,(,四,),十二，商是,4,。,第一只分,3,个，,12,-,3=9,；,第二只分,3,个，,9,-,3=6,；,第三只分,3,个，,6,-,3=3,；,第四只分,3,个，正好分完。,1,只猴分,3,个，,2,只猴分,6,个,可以用乘法口诀算。,12,3,=,4,你喜欢哪种方法,?,(,2,),12,个桃平均分给,4,只小猴，每只小猴分几个,?,12,4,=,3,你是怎样算的,?,(,三,),四十二，,商是,3,。,4,6,=24,每行栽,4,棵。,可以栽,6,行。,2,24,4,=,24,6,=,四,(,六,),二十四，,可以栽,6,行。,你是怎样算的,?,(,四,),六二十四，,每行栽,4,棵。,6,4,4,6,=24,1.,10,2,=,5,12,6,=,2,8,2,=,4,10,5,=,2,12,2,=,6,8,4,=,2,2.,5,4,=20,20,4,=,5,20,5,=,4,6,3,=18,18,3,=,6,18,6,=,3,5,6,=30,30,6,=,5,30,5,=,6,1.,怎样想,?,6,3,=,2,=,2.,有,(,),只鸽子，,(,),个鸽房。,可以用哪句口诀想出商,?,15,3,15,3,5,三五十五,3.,送信。,8,4,10,2,3,3,4,2,12,6,6,6,5,1,9,3,6,1,8,2,12,4,6,3,5,5,6,2,12,3,1,2,3,4,5,6,4,4,3,1,10,5,4,1,2,2,=,=,15,3,5,15,5,3,=,3,5,15,4.,5.,25,5,18,6,9,3,24,4,20,4,30,5,20,5,18,3,算对了，就把玩具摘下来。,6.,4,16,20,8,4,1,4,5,2,1,4,5,2,36,30,24,12,6,1,4,5,2,6,5,4,2,哪几句口诀只能说一个乘法算式和一个除法算式,?,二六十二,6,2=12,2,6=12,12,6=2,12,2=6,7.,8.,写出乘法算式和除法算式。,6,3=18,18,3=6,18,6=3,9.,3,3,5,4,4,4,6,5,5,30,6,30,5,12,6,24,6,24,4,12,2,10.,找朋友。,15,3,8,2,6,3,3,4,25,5,8,4,18,3,12,4,15,5,把用同一句口诀计算的,算式作上相同的记号。,10,5,18,3,8,4,24,6,6,2,20,5,18,6,4,4,11.,看谁先到家。,12,2,16,4,15,3,4,2,=6,=4,=5,=2,=6,=2,=4,=2,=3,=4,=3,=1,=,12,3,4,12.,12,米,?,米,?,米,?,米,