Predict: I will need to make sure the correct values come together.
Clarify: I will need to find the correct number spots.
Find the big question: How do these numbers fit into the grid?
Solve: I started with the 4 digit numbers as there were less of this type. Then I began trying to fit the 3 digit numbers into there places on the grid connected to the 4 digit numbers.
Summary: I used the trial and error strategy.