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# Monthly Archives: September 2008

## Day 20 – September 23

Algebra: Chapter 2, Lesson 9, page 98. Writing Equations Plan to write and solve an equation by: Can I use a variable to represent an unknown number? Can I represent other conditions in terms of the variable? Can I find … Continue reading

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## Day 19 – September 22

Algebra: Chapter 2, Lesson 8, page 93. Inverse of a Sum and Simplifying The inverse of a SUM Property: For any rational numbers, `−(a+b)=−a+(−b)`. The additive inverse of a sum is the sum of the additive inverses. In other words, … Continue reading

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## Day 18 – September 19

Algebra, Chapter 2, Lesson 7, page 89. Using the Distributive Property The distributive property of multiplication over addition and subtraction is: `a(b+c)=ab+ac` and `a(b−c)=ab−ac` You can also combine LIKE TERMS ONLY IF THE VARIABLE AND THE EXPONENT OF THE VARIABLE … Continue reading

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## Day 17 – September 18

Algebra: Chapter 2-5 and 2-6, pages 77 and 81 Multiplication and Division of Rational Numbers Today is easy because the rules for multiplication and division are simple. When multiplying 2 numbers AND if the SIGNS are the same, the product … Continue reading

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## Day 16 – September 17

Algebra: Chapter 2, Lesson 4, page 71. Subtraction of Rational Numbers Today, we are working on subtraction of rational numbers. Remember, just do the inverse of subtraction and ADD the inverse (or opposite) of the number to the other number. … Continue reading

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## Day 13 and 14 – September 12 and 15

Algebra: Chapter 1 Review, page 50-51. (Friday) Preparation for Chapter Test on Monday. Bring your notes and the Chapter Review problems (for additional notes) fo the test on Monday. Algebra: Chapter 1 TEST (Monday)

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## Day 12 – September 11

Algebra: Chapter 1, Lesson 10, page 44 Reasoning Strategies – or Try, Test and Revise UNDERSTAND the Problem Develop and carry out a PLAN Find the ANSWER and CHECK Strategies look like: Draw a diagram Make an Organized list Look … Continue reading

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## Day 11 – September 10

Algebra: Chapter 1, Lesson 9, page 40. Using Formulas A formula is an equation that shows a relationship between 2 or more variables. The formula for the area of a rectangle is `a = l⋅w`. Given the length and width … Continue reading

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## Day 10 – September 9

Algebra: Chapter 1, Lesson 8, page 38. Reasoning Strategies Reasoning Strategies to use: Phase 1: UNDERSTAND the problem What am I trying to find out? What data am I given? Have I ever solved a similar problem? Phase 2: Develop … Continue reading

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## Day 9 – September 8

Algebra: Chapter 1, Lesson 7, page 33. Solving Equations, An Introduction An EQUATION is a mathematical sentence that uses the equal sign `=` to state that 2 expressions represent the same number or are equivalent. An equation that contains at … Continue reading

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