: The level concludes with the study and solution of various differential equations. Purpose and Functionality The solution book is designed to support Kumon's self-learning philosophy Step-by-Step Logic
Percent increase: 50 → 65 is what percent increase? (65-50)/50 = 15/50 = 0.3 = 30%
There is no rule against using outside resources to learn how to do math. If the worksheet asks you to simplify $\fracx^2-9x+3$, and you don't know how, do not look up the Kumon answer. Instead:
As math gets harder, just knowing the final answer is not enough. You need to see how to get there. The Level O solution book shows every single step of the puzzle. Spot Mistakes Fast