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Published byBaldwin Caldwell Modified over 6 years ago

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IN ALGEBRA COUNTY DIVIDING INTEGERS

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5 DIVIDED BY 6 CAN BE WRITTEN:

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5 DIVIDED BY 6 That’s the best way.

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could mean 12 m&m’s divided among six people. Each person has a dixie cup. What does division mean?

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could mean 6 m&m’s divided among four people. Each person has a dixie cup.

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DIVISION RULES FOR NEGATIVE NUMBERS ARE THE SAME AS FOR MULTIPLICATION

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Therefore: Positive positive = Positive negative = Negative positive = Negative negative = + - - +

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The number 1 is very important in Algebra County: 1

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Write these in your notes:

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“Subtracting” Integers In Algebra County

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In Algebra County, we don’t actually subtract. We think of the minus sign as a negative. 3 - 5 We can circle the number with its sign. We have 3 and negative 5

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-4 - 5 Negative 4 and negative 5 -1 + 3 Negative 1 and 3 7 - 2 7 and negative 2 -9 2 5

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Remember how we put a “1” in places where it is understood to be? 3 - (- 5) 3 and negative 1 times negative 5 1

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-4 - (- 5) Neg 4 and neg 1 times neg 5 -1 - (- 3) Neg 1 and neg 1 times neg 3 7 - (- 2) 7 and neg 1 times neg 2 1 1 1

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-4 - (- 5)1 -4 + 5 Negative times negative is positive. 1 The answer is: We multiply before adding Write these in your notes:

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-1 + 3 Negative times negative is positive. 2 The answer is: -1 - (- 3)1 We multiply before adding

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7 + 2 Negative times negative is positive. 9 The answer is: 7 - (- 2)1 We multiply before adding

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-3 + 1 Negative times negative is positive. -2 The answer is: -3 - (- 1)1 We multiply before adding

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Now you have learned how to “subtract” Without subtracting

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This is a symbol used in math. It shows that a number is definitely positive and is called the absolute value symbol.

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We put numbers or variables inside the lines. = The answer is 3 because the absolute value of anything is positive.

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= Even if we have a negative inside the absolute value sign:

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Here’s an example:

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= We add the numbers inside first. =

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The End

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