乐乐在做课后练习时遇到这样一道思考题:□+□+□+□=8,12=○+○+○求:□=?○=?思路点睛:观察题中的两道算式,我们可以发现,第一道算式是4个□相加的和等于8,第二道算式是3个○相加的和等于12,让我们分别求出□、○代表什么数字。该怎么求呢?因为第一道算式是4个相同的□相加,第二道算式是3个相同的○相加,根据乘法的意义,我们可以把题中的这两个加法算式换个方式,变成乘法,即 Lele after doing exercises in the class encountered such a question of thinking: □ + □ + □ + □ = 8,12 = ○ + ○ + ○ seeking: □ =? ○ =? Ideas dot: the observation of the two equations , We can find that the first formula is the sum of 4 □ and equal to 8, the second formula is 3 ○ and the sum of the sum is equal to 12, let us find □, ○ represents what figure. How to find it? Because the first formula is the same four additions, the second formula is the same three addition, according to the meaning of multiplication, we can put the question of the two addition formula for another way , Into multiplication, that is