Final answer:
Each fifth-grade class at Edgar Elementary School must read 946 more pages than each fourth-grade class to meet their reading contest goals.
Step-by-step explanation:
The question asks us to calculate how many more pages each fifth-grade class has to read than each fourth-grade class in a reading contest. To find the difference, we subtract the goal of the fourth-grade class from the goal of the fifth-grade class:
2,212 pages (fifth-grade goal) - 1,266 pages (fourth-grade goal) = 946 pages.
Therefore, each fifth-grade class has to read 946 more pages than each fourth-grade class to meet their respective reading goals.