OH.NNSO. Number, Number Sense and Operations: Students demonstrate number sense, including an understanding of number systems and operations and how they relate to one another. Students compute fluently and make reasonable estimates using paper and pencil, technology-supported and mental methods.
NNSO.14. Grade Level Indicator: Computation and Estimation: Use proportional reasoning, ratios and percents to represent problem situations and determine the reasonableness of solutions.
NNSO.9. Grade Level Indicator: Meaning of Operations: Give examples of how ratios are used to represent comparisons; e.g., part-to-part, part-to-whole, whole-to-part.
NNSO.D. Use models and pictures to relate concepts of ratio, proportion and percent.