遵守规则方能不受规则制约。妈妈下班时,收到了数学老师发来的短信:今天数学单元测验,宁宁的成绩59分。妈妈心急火燎地回到家里,来不及放下手里的拎包,便直奔女儿房间。宁宁正趴在书桌上订正试卷。妈妈板着脸,把手中的拎包重重地扔在床铺上,厉声斥责道:“今天数学考试,你居然得了59分!念一年级成绩就跟不上,往后该怎么办?”这是一张20以内的加减法 To abide by the rules can not be subject to rules. When her mother got off work, she received a text message from a math teacher: Today’s math unit test, Ningning’s score of 59 points. Mother anxiously returned home, too late to put down the bag in hand, went straight to her daughter’s room. Ningning is lying on the desk to correct the papers. Mum board face, the hands of the bag thrown heavily on the bed, snapped reproach: "Today’s math exam, you actually got 59 points to read the first grade can not keep up, the future how to do? Is an addition and subtraction within 20