一、案例这次的递等式练习中,元元又不出所料的8题中错了6题。“元元,你看这题错在哪呢?”145+55×3=200×3=600“恩?”孩子久久不知道怎么回答。“在做递等式计算时,先?”乘除“”后怎么“”后加减“”现在你知道错在哪了吗?“”哦,应该先算55×3,然后再加145。“”对了,这就是陷阱,所以在做计算前一定要先想想正确的计算顺序,然后再算。那下面一题又错在哪呢?……“就这样一题一题让孩子分析错在哪。”好 First, the case of this pass equation exercises, Yuan Yuan is not as expected of the 8 questions in the wrong 6 questions. “Yuan Yuan, where do you see this problem?” “145 +55 × 3 = 200 × 3 = 600” Grace? “” Children a long time do not know how to answer. “” “” “Now you know where the wrong? ” “Oh, you should first count 55 × 3, then add 145. This is a trap, so be sure to think about the correct order of calculations before you do the calculations, and then again. Then what is wrong with the following question? ...... ”So a question for children to analyze what is wrong.“ ”Good