文档介绍：婴幼儿家长教孩子学数学的几个有效方法
several group number, then with b ± a, =c,c is is methyl b two vertical box between of accur1个嘴巴，1个鼻子，2只眼睛，2只耳朵。〞有些儿歌也说的很好：例如，?婴儿画报?中有一首儿歌就非常好：
               1个闹钟嘀嘀嗒，
               叫醒2个小娃娃，
               3只青蛙呱呱呱，
several group number, then with b ± a, =c,c is is methyl b two vertical box between of accurate size. Per-2~3 measurement, such as proceeds of c values are equal and equal to the design value, then the vertical installation accurate. For example a, b, and c valueswhile on horizontal vertical errors for measurement, General in iron angle code bit at measurement level points grid errors, specific method is from baseline to methyl vertical box center line distance for a,, to b vertical box distance for b, list can measured
several group number, then with b ± a, =c,c is is methyl b two vertical box between of accurate size. Per-2~3 measurement, such as proceeds of c values are equal and equal to the design value, then the vertical installation accurate. For example a, b, and c valueswhile on horizontal vertical errors for measurement, General in iron angle code bit at measurement level points grid errors, specific method is from baseline to methyl vertical box center line distance for a,, to b vertical box distance for b, list can measured
several group number, then with b ± a, =c,c is is methyl b two vertical box between of accur