Math Worksheets and Study Guides Third Grade. Estimation

The resources above correspond to the standards listed below:

Maryland College and Career-Ready Standards

MD.MA.3.OA. Operations and Algebraic Thinking (OA)
3.OA.D. Solve problems involving the four operations, and identify and explain patterns in arithmetic.
3.OA.D.8. Major Standard: Solve two-step word problems using the four operations. Represent these problems using equations with a letter standing for the unknown quantity. Assess the reasonableness of answers using mental computation and estimation strategies including rounding.
3.OA.D.8.8. Knowledge of and ability to apply estimation strategies, including rounding and front-end estimation, to make sense of the solution(s).
3.OA.D.8.9. Ability to apply knowledge of place value to estimation.
MD.MA.3.NBT. Number and Operations in Base Ten (NBT)
3.NBT.A. Use place value understanding and properties of operation to perform multi-digit arithmetic.
3.NBT.A.1. Additional Standard: Use place value understanding to round whole numbers to the nearest 10 or 100.
3.NBT.A.1.1. Knowledge of place value through 1,000 (2.NBT.A.1) to provide the foundation for rounding whole numbers.
3.NBT.A.1.2. Knowledge that place value refers to what a digit is worth in a number.
3.NBT.A.1.3. Knowledge that each place in a number is worth 10 times more than the place to the right of it (The tens column is worth 10 ones, the hundreds column is worth 10 tens).
3.NBT.A.1.4. Ability to use a variety of strategies when rounding (e.g., number line, proximity, and hundreds chart).
3.NBT.A.1.5. Ability to round a three-digit number to the nearest 10 or 100.
3.NBT.A.3. Additional Standard: Multiply one-digit whole numbers by multiples of 10 in the range of 1090 (e.g., 9x80, 5x60) using strategies based on place value and properties of operations.
3.NBT.A.3.1. Ability to apply knowledge of place value (e.g., 9x80 is 9 times 8 tens = 72 tens).
Standards

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