SOLUTION
Given the question in the question tab, the following solution steps help get the number of students of fourth grade class.
Step 1: Write the number of students in each class
Step 2: State the number of fourth grade classes
Step 3: Calculate the number of fourth grade students in all
Hence, the number of fourth grade students in all is about 138 students
I solved this by finding the product of the number of students in each class and the number of fourth grade classes