The fourth question 45 divided by 150 is equal to 3/00 of 10, and 10 divided by 45 is equal to 3/00 of 10. 5 1 class wears myopia glasses in a small proportion, and the situation is good. Question 5: Six people. Question 6: 2 divided by 3 is approximately equal to 0.7 yuan, and 4 divided by 5 is equal to 0.8 yuan. The second pencil is cheaper. Question 7: 2/9, 3/4. The least common multiple of questions 6 and 4 in question 8 is 12, and 12+2 is equal to 14 yuan.