Lesson 2 3 Subtracting Integers Clear Targets Subtract

Lesson 2. 3: Subtracting Integers Clear Targets: ▪ Subtract positive and negative integers

Subtracting Integers ADD *To subtract an integer, ________ its opposite. Then use the rules of adding integers. 2 + (-9) -7 Ex/ 2 – 9 = ______ = ____ 4+5 9 4 – (-5) = _______ = _____ Ex/ 1: Subtracting Integers -49 + 7 a) -49 – (-7) = ______ -42 ____ -15 + (-36) b) -15 – 36 _______ -51 ____ Add the opposite. ______________________________ Add.

Guided Practice: Find the difference. 1) 18 – 57 2. ) -13 – 9 3. ) 34 – (-25) 4. ) -62 – (-100) 18 + (-57) -13 + (-9) 34 + 25 -62 + 100 -39 -22 59 38

Ex/ 2: Evaluating a Variable Expression Evaluate x – 33 – y when x = 19 and y = -41. 19 x - 33 – y = ______ - 33 – (_____) -41 Substitute 19 for x and 41 for y. -41 19 -33 = ______ + _______ – (_____) Add the opposite of 33. -14 -41 = ______ – (_____) Add 19 and -33. 41 = -14 ______ + _______ Add the opposite of -41. = 27 ______ Add.

Ex/ 3: Standardized Test Practice What is the vertical height of the mineshaft? Show your work!!!! 55 – (-218) = 55 + 218 Add the opposite. = 273 feet Answer: The vertical height of the mineshaft is 273. The correct answer is D.

Do you feel like you understand can demonstrate the clear targets for today? �Clear Targets: ▪ Subtract positive and negative integers **Make sure you see me for extra help if you don’t!!! HW: 2. 3 Worksheet