What I Have Learned In solving routine and non-routine problems involving different types of numerical equations such as 7+9=_+6, follow the four-step approach that will help us organize the given information so that we can write an equation that will enable us to solve the problem.

1. Understand
a. Identify what is/are asked.
b. Identify what is/are given.

2. Plan
c. Analyze the information.
d. Represent the data.
e. Write an equation.

3. Solve
b. Solve the equation

4. Check
c. Check the solution.
d. Decide if the answer is reasonable.​