2. The teacher took several children to the movies and bought tickets for 1 1. There are () children watching movies with their teachers.
Eight female students stand in a row. Every two female students insert three male students, and * * * inserts () male students.
4. Fill in 2, 3, 4 and 5 in () respectively, and each number can only be used once.
( )+( )-( )=( )
5. Children line up. Xiaoping has four people on his left and eight people on his right. There are () people in this line.
6. Children line up. Xiaoping is left four and right eight. There are () people in this line.
7. Write numbers regularly.
8、 15、 10、 13、 12、 1 1、( )、( )
1、4、3、6、5、( )、( )
1、2、4、8、( )、( )
8. Xiao Ming, Xiao Lin and Xiao Hong are weighed together, and the result is that Xiao Ming is heavier than Xiao Lin, Xiao Lin is heavier than Xiao Hong, and Xiao Ming is heavier than Xiao Hong. Among them, () is the heaviest and () is the lightest.
9. Xiaoming, Xiaohong and Xiaolin ran 100 meters. Xiao Ming used 13 second, Xiao Lin used 12 second and Xiao Hong used 1 1 second. Then, () is the first and () is the second.
10, Qiang Qiang's weight is 27 kg, and Fang Fang's weight is 25 kg. Dongdong ranks third in weight,
The weight difference between him and Qiang Qiang is 5 kg, and Dongdong's weight is () kg.