1.9 people, Xiao Ming himself is one. 2. Sixth, count by yourself. 3. 16, without explanation. The 4.2-minute chorus is also the end of a song, which has nothing to do with numbers. 5.45 sheets, 1 plus 2 plus 3, until 9 equals 45. 6.30, 5 times 2 times 3 7.9 layers, has nothing to do with 18, and the other 8.240 1 types are not explained. For arithmetic progression with a tolerance of 2, 1 plus 3 plus 5 plus 7 has been added to 97, and the calculation result is 240 1. Anyone who has studied high school mathematics should know why. 9.6 years old, this really doesn't need to be explained too much. . 10. No matter how you drink it or add it, it's just a glass of orange juice. Add two and a half glasses of water to make a cup.