1. Estimation and Computation By: Your Name (First, Last) Section: O-

2. Partial Sums A method to add in which sums are computed for each place value.

3. Expanded Notation A way of writing a number as the sum of the values of each digit. Example: 356 = 300 + 50 + 6

4. Place Value A system that gives a digit a value according to its position in the number. Example: Base 10 System

5. Column Addition Method A method for adding by which columns are added first and then trades are made until single digits remain.

6. Minuend, Subtrahend, and Difference 19 (Minuend) - 5 (Subtrahend) 14 (Difference)

7. Trade First Subtraction A subtraction method in which all trades are done before any subtraction is carried out. Example:

8. Partial Difference Method A way to subtract in which differences are computed for each place (ones, tens, hundreds, etc.) separately. The partial difference are then combined to give a final answer. Example: