Survey
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
1-5 Adding Integers Review: Integers: Positive, negative whole numbers and zero (no decimals or fractions) New Material: There are three parts to today's lesson: Adding positive integers Adding negative integers Adding a positive integer and a negative integer - Using the number line - Using tiles - Using the rules I. Adding Positive Integers (Regular Addition) 1.) 9 + 15 = 2.) 3 + 12 = 3.) 17 + 2 + 3 = II. Adding Negative Integers (Regular Addition) 1.) -18 + (-5) = 2.) -74 + (-5) = 3.) -1 + (-2) + (-3) = III. Adding A Positive and A Negative Integer A.) Using the number line -10 -9 -8 -7 -6 -5 -4 1.) -4 + 6 = 2.) (-8) + 6= 3.) -10 + 7 = *4.) 5 + (-6) = -3 -2 -1 0 1 2 3 4 5 6 7 8 9 10 III. Adding A Positive and A Negative Integer B.) Using Tiles You can use tiles to add integers. means + 1 means -1 The zero principle states that when you add two opposites, their sum is equal to zero. (+1) + (-1) = 0 Solve each problem using the tiles. Draw the tiles to help solve the problems. 5 + (-4) = (-6) + 2 = III. Adding One Positive and One Negative Integer C.) Using the Rule Rule: Subtract the absolute values the answer has the sign of the number with the larger absolute value 1.) (-8) + 13 2.) 3 + (-19) 3.) 12 + (-4) Practice: 1.) 16 + (-9) 2.) -9 + 13 3.) 5 + (-5) 4.) -2+ (-18) 5.) -22 + (-9) 6.) -7 + 28 7.) -27 + 13 8.) -19 + 27 9.) -23 + 31 10.) -5 + 31 Other Examples: When adding many integers, try adding all the positive or negative integers first. Then add the two numbers. 1.) -7 + 14 + (-3) 2.) 13 + (-6) + (-12) 3.) -4 + (-9) + (-5) + 12 5.) -2 + (-13) + (-5) 4.) -14 + 22 + 2 6.) 116 + (-119) + (-8)