**Maryland Education Standards**. To estimate means to make an educated guess based on what you already know. Read More...

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MD.6.0. Knowledge of Number Relationships and Computation/Arithmetic: Students will describe, represent, or apply numbers or their relationships or will estimate or compute using mental strategies, paper/pencil, or technology.

6.C.2. Number Computation: Estimation.

6.C.2.a. Determine the approximate sum and difference of 2 numbers (Assessment limit: Use no more than 2 decimal places in each and numbers (0 - 100)).

6.C.2.b. Determine the approximate product or quotient of 2 numbers (Assessment limit: Use a 1-digit factor with the other factor having no more than 2-digits or a 1-digit divisor and no more than a 2-digit dividend and whole numbers (0 - 1000)).

MD.7.0. Processes of Mathematics: Students demonstrate the processes of mathematics by making connections and applying reasoning to solve and to communicate their findings.

7.C.1. Communication: Present mathematical ideas using words, symbols, visual displays, or technology.

7.C.1.a. Use multiple representations to express concepts or solutions.

7.C.1.d. Express solutions using concrete materials.