例1:有9个小朋友排成一行,小红排在其中,小红的前边有3人,小红的后边有几人?【分析与解】解答本题,可以画出如下图示(●表示小红):前○○○●○○○○○后小红从图示看到,9个人排成一行,小红的前边有3人,那么,小红排第4位;这样,小红的后边就有5人。写成算式就是: Example 1: There are nine children in a row, the red row in which the small red in front of three people, behind the red few people? [Analysis and solution] answer this question, you can draw the following icon (● said Red): before ○ ○ ○ ○ ○ ○ ○ ○ ○ after the red from the icon to see, 9 individuals lined up, the front of the red 3, then the red 4; then, red There are 5 people behind. Write the formula is: