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Unit 2 CCMath Vocab

Adding and Subtracting Whole Numbers

Addition total amount of objects together in a collection
Addends The numbers that are added together to find a sum.
Sum The result of adding numbers together.
Subtraction The process or skill of taking one number or amount away from another.
Difference The answer when subtracting two numbers.
Mental Math The process of completing math problems in your head.
Breaking apart Mental math method used to rewrite a number as the sum of numbers to form an easier problem.
Counting on Counting up from the smaller number to find the difference of two numbers.
Compensation Choosing numbers close to the numbers in a problem, and then adjusting the answer to compensate for the numbers chosen.
Commutative Property of Addition Numbers can be added in any order and the sum remains the same.
Associative Property of Addition Addends can be regrouped and the sum remains the same.
Inverse Operations Two operations that undo each other. Addition and subtraction are inverse operations.
Estimate To make an approximate or rough calculation, often based on rounding.
Identity Property of Addition Any number added to zero (0) will give that number as the sum.
Reasonable An answer that makes sense and can be proven.
Unreasonable An answer that does NOT make sense and can't be proven.
Regrouping Rearranging the formation of a group. For example: a group of 10 ones can be formed into 1 ten.
Whole Number Any number between 0 and infinity that DOES NOT contain a fraction or a decimal.
Created by: ESASDgrade4