论文部分内容阅读
笨笨猪读一年级啦,但笨笨猪并不笨。瞧,开学不到一个月的时间,笨笨猪就学会了20以内的进位加法。为了巩固笨笨猪的计算知识,猪爸爸给笨笨猪出了一些20内的口算题,可每次猪爸爸刚说出算式,笨笨猪就把答案说出来了。猪爸爸很是好奇,于是又出了这样一道题:7+9=?并让笨笨猪说说口算的方法。笨笨猪信心十足地说:“数学老师教我们,20以内的进位加法都是用‘凑十法’来进行口算的。我先记住口诀‘看大数,分小数,凑成十,再加剩下数’来口算的。所以,口算7+9=?时,我先看大数9,想
Stupid pigs read first grade, but stupid pigs are not stupid. See, less than a month after school, stupid pigs learned to carry within 20 additions. In order to consolidate the stupid pig’s computational knowledge, pig father to stupid pig out of some 20 within the problem, every time a pig father just say the formula, stupid pig put the answer out. Pig father is very curious, so there is such a question: 7 +9 =? And let stupid pig talk about the method of calculation. Stupid pig confident to say: ”Mathematics teacher to teach us that the addition of carry within 20 are used ’Minato ten’ for the word count .I remember the formula ’look at the large number, sub-decimal, make up ten, Plus the remaining number ’to the mouth count. So, the mouth count 7 +9 =?, I first look at the large number 9, think