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Published byBranden McGee Modified over 8 years ago

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Bell Ringer 1. -5 + -6 = 2. -2 – 5 = 3. 3 -7 =4. -10 ÷ -2 = 5. 9 -3 =6. -7 – (-7) = After you have completed the bell ringer, take out your homework!

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Rules for Addition of Integers 1. If the signs are the same, add and keep the sign. -5 + -6 = -117 + 4 = 11 2. If the signs are different, subtract and take the sign of the bigger number. -8 + 9 = 1-7 + 2 = -5

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Rules for Subtraction of Integers 1. Change the sign of the second number and follow the rules for addition. 6 – (-5) = 6 + (+5) = 11 -3 – (+2) = -3 + (-2) = -5

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Rules for Multiplication and Division of Integers 1. If the signs are the same, the answer is positive. 2. If the signs are different, the answer is negative. - 6 -3 = +18-5 4 = -20 -20 ÷ -4 = +5+35 ÷ -7 = -6

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Order of Operations A Lesson in Organization

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Definitions Order of Operations tells us the order we simplify and evaluate expressions using operations (PEMDAS) Expressions are math statements that DO NOT HAVE AN EQUALS SIGN Simplify means to reduce an expression to its simplest terms Evaluate means to find the value of an expression (calculate)

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PEMDAS or Not To PEMDAS? 1. Parentheses – Do everything inside of them first! 2. Exponents – Apply exponents to their bases. 3. Divide and Multiply – In order from left to right! 4. Add and Subtract – In order from left to right!

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Samples A.3 + 4 6 – 3 = B.6 + 3² – 2 5 + 2 = C.5 + (4 – 2) 3 + 1 = A.24 B.7 C.12

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Am I Right or Am I Wrong? Add parentheses to make each statement true! 1.4 + 5 9 – 3 = 34 2.12 8 – 5 + 2 = 38 3.15 + 2 6 – 10 = 7 4.3 8 ÷ 4 + 4 = 24 ( )

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