Today we will proceed with the number 2。First of all, Question 1。Perform approximate fractional equations and quadruple arithmetic calculations。Next up is Q2.。Solving by coefficient comparison method and numerical assignment method。In the numerical assignment method, do not forget to check the reverse。And then there's Question 3.。Conditional expressions can be solved by making them easy。Question 4.。Proportional formula puts =k。Further Q5。Compare big and small...