Ohio Learning Standards
OH.3.OA. OPERATIONS AND ALGEBRAIC THINKING
Solve problems involving the four operations, and identify and explain patterns in arithmetic.
3.OA.8. Solve two-step word problems using the four operations. Represent these problems using equations with a letter or a symbol, which stands for the unknown quantity. Assess the reasonableness of answers using mental computation and estimation strategies including rounding. This standard is limited to problems posed with whole numbers and having whole-number answers. Students may use parentheses for clarification since algebraic order of operations is not expected.
OH.3.NBT. NUMBER AND OPERATIONS IN BASE TEN
Use place value understanding and properties of operations to perform multi-digit arithmetic. A range of strategies and algorithms may be used.
3.NBT.2. Fluently add and subtract within 1,000 using strategies and algorithms based on place value, properties of operations, and/or the relationship between addition and subtraction.