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Adding and Subtracting Whole Numbers and Perimeter

Section 1.3. Adding and Subtracting Whole Numbers and Perimeter. 3 + 4 = 7 addend addend sum. Addition Property of 0. The sum of 0 and any number is that number. 8 + 0 = 8 and 0 + 8 = 8. Martin-Gay, Prealgebra, 5ed. Commutative Property of Addition.

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Adding and Subtracting Whole Numbers and Perimeter

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  1. Section 1.3 Adding and Subtracting Whole Numbers and Perimeter 3 + 4 = 7 addend addend sum

  2. Addition Property of 0 The sum of 0 and any number is that number. 8 + 0 = 8 and 0 + 8 = 8 Martin-Gay, Prealgebra, 5ed

  3. Commutative Property of Addition Changing the order of two addends does not change their sum. 4 + 2 = 6 and 2 + 4 = 6 Martin-Gay, Prealgebra, 5ed

  4. Associative Property of Addition Changing thegroupingof addends does not change their sum. 3 + (4 + 2) = 3 + 6 = 9 and (3 + 4) + 2 = 7 + 2 = 9 Martin-Gay, Prealgebra, 5ed

  5. Subtraction Properties of 0 The difference of any number and that same number is 0. 9 - 9 = 0 The difference of any number and 0 is the same number. 7 - 0 = 7 Martin-Gay, Prealgebra, 5ed

  6. A polygonis a flat figure formed by line segments connected at their ends. Geometric figures such as triangles, squares, and rectangles are called polygons. triangle square rectangle Martin-Gay, Prealgebra, 5ed

  7. Finding thePerimeterof a Polygon The perimeter of a polygon is the distance aroundthe polygon. Martin-Gay, Prealgebra, 5ed

  8. Descriptions of problems solved through addition may include any of these key words or phrases: Martin-Gay, Prealgebra, 5ed

  9. Descriptions of problems solved by subtraction may include any of these key words or phrases: Martin-Gay, Prealgebra, 5ed

  10. Helpful Hint Be careful when solving applications that suggest subtraction. Although order does not matter when adding, order does matter when subtracting. For example, 10 – 3 and 3 – 10 do notsimplify to the same number. Martin-Gay, Prealgebra, 5ed

  11. Helpful Hint Since subtraction and addition are reverse operations, don’t forget that a subtraction problem can be checked by adding. Martin-Gay, Prealgebra, 5ed

  12. 52 Number of BestPicture Nominees 25 16 0 2 Ratings Reading a Bar Graph Source: The internet Movie Database and Cuadra Associates Movie Star Database, 2003. The graph shows the ratings of Best Picture nominees since 1984.

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