Second volume of the people's education press mathematics fraction exercise 16 Questions 11, 12, 13, 14,

Second volume of the people's education press mathematics fraction exercise 16 Questions 11, 12, 13, 14,

eleven
a÷m÷10÷a÷(m-3)
twelve
m÷a-m÷(a+3)
thirteen
n÷t-n÷(t-0.5)
fourteen
m÷[m÷n+m÷n-(0.5)]