Summary 83 Section 1.2 Addition of Whole Numbers and Perimeter Key Concepts The sum is the result of adding numbers called addends. Addition is performed with and without carrying. Addition Property of Zero The sum of any number and zero is that number. Commutative Property of Addition Changing the order of the addends does not affect the sum. Associative Property of Addition The manner in which the addends are grouped does not affect the sum. There are several words and phrases that indicate addition, such as sum, added to, increased by, more than, plus, and total of. The perimeter of a polygon is the distance around the outside of the figure.To find perimeter, take the sum of the lengths of all sides of the figure. Examples Example 1 For 2 7 9, the addends are 2 and 7, and the sum is 9. Example 2 76 265 23 41 64 Example 3 1 1 8 1 16 0 16 Example 4 9 3 12 12 3 Example 5 2 119 32 12 192 3 Example 6 The sum of 6 and 18 translates to 6 18. Example 7 The expression 5 4 can be translated as 5 increased by 4, or 4 more than 5. Example 8 The perimeter is found by adding the lengths of all sides. 42 in. 38 in. 31 in. Perimeter 42 in. 38 in. 31 in. 111 in.
miller_basic_college_math_3e_ch1_3
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