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[DOC File]Using Manipulatives to develop the rules for adding and ...
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I suggest that instructors do the first activity (adding positive and negative numbers) on one day, and then on another day do the second activity (subtracting positive and negative numbers). In this way, students will be familiar with the demonstration process before they develop the more difficult rule (subtracting positive and negative numbers).
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[DOC File]POSITIVE AND NEGATIVE INTEGERS
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B. Rules for Subtracting Positive and Negative Numbers. To subtract signed numbers (either positive or negative), change the subtraction sign to addition and change the sign of the number that follows, then revert back to the addition rules. Example #1: (+8) - (+5) = (+8) + (-5) = +3.
subtracting negative numbers pdf

[DOC File]www.opentextbookstore.com
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5.2 Adding / Subtracting Signed Numbers. To add signed numbers of the same sign (both positive or both negative) Add the absolute values of the numbers If both numbers are negative, the sum is negative Example: Add: –8 + (–5) Since both numbers are negative, we add their absolute values: 8 + 5 = 13
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[DOC File]Strategies for Adding & Subtracting Integers
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(positive & negative whole numbers) 1. Song to help you remember how to add and subtract integers: Same signs, add and keep. Different signs subtract. Keep the sign of the bigger # And then you’ll be exact! (Sung to “Row, row, row your boat”) 2. KOOL to change a subtraction sentence into addition: K O O L. e p p e. e p p t’
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[DOC File]Solving Inequalities
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negative. number, you must . change. the direction of the inequality symbol. Example: Solving Inequalities Using Addition/Subtraction. Solve the following inequalities and graph the solution on the number line. y + 3 > 5 b. x - 3 < 5. Step 1: Isolate y variable Step 1: Isolate the x variable. Subtract 3 from both sides add 3 to both sides
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[DOC File]Name______________________________
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Adding & Subtracting Radicals HW #4 Adding & Subtracting Radicals continued HW #5 ... one positive and one negative. For example: = 5 and = -5 because 52 = 25 and (-5)2 = 25 ... -These numbers can be “added” because the radicands are the same.-However, only the numbers in …
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[DOC File]Guided notes: Scientific notation
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ADDING or SUBTRACTING in scientific notation. 1. First make sure that the numbers are written in the same form (have the same exponent) 3.2 x 103 + 40 x 102 (change to 4.0 x 103) Add (or subtract) first part of exponent (mantissas) 3.2 + 4.0 = 7.2. The rest of the exponent remains the same. Answer: 7.2 x 103. How do you make the exponents the same?
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Worksheets for subtracting negative numbers