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.12. Grade Level Indicator: Computation and Estimation: Add and subtract whole numbers with and without regrouping.
NNSO.2. Grade Level Indicator: Number and Number Systems: Use place value concepts to represent whole numbers and decimals using numerals, words, expanded notation and physical models. For example:
NNSO.2.c. Model the size of 1000 in multiple ways; e.g., packaging 1000 objects into 10 boxes of 100, modeling a meter with centimeter and decimeter strips, or gathering 1000 pop-can tabs.
NNSO.K. Analyze and solve multi-step problems involving addition, subtraction, multiplication and division of whole numbers.
NNSO.L. Use a variety of methods and appropriate tools (mental math, paper and pencil, calculators) for computing with whole numbers.