Category Archives: Math 8

Algebra: Chapter 10-5 and 10-6, p 445 and 451 Addition and Subtraction: Unlike Denominators (Chapter 10-5) This lesson is TOUGH and takes time to do right. We have to bring all of our tools to the problem. Know how to … Continue reading →

Algebra: Chapter 10-3, p 439 Dividing Rational Expressions We divide rational expressions using the same techniques we used in Chapter 10-2. The only difference is that we have to change the division sign in front of the 2nd term to … Continue reading →

Algebra: Chapter 10-2, p 436 Multiplying Rational Expressions To multiply rational numbers, we multiply the numerators and multiply the denominators. We multiply rational expressions in the same way. For example, we have the following 2 examples: `(–2)/(2y+6)*3/(y–5)=(-2*3)/((2y+6)(y-5))=(-2*3)/((2)(y+3)(y-5))=(-3)/((y+3)(y-5))` and `4/(5x^2)*(x-2)/(2x^3)=(4(x-2))/(10x^5)=(2(x-2))/(5x^5)` Here … Continue reading →

Algebra: Chapter 10-1, p 432 Simplifying Rational Expressions A rational expression is a quotient of 2 polynomials. A rational expression always indicates division. A rational expression is in simplest form when the numerator and denominator have NO COMMON factors other … Continue reading →

Algebra: Chapter 6 TEST today! Math-8: Chapter 9-8, p 462 Percent and Estimation Sometimes, when we work with percents, an exact answer is not needed. Sometimes, we can estimate. An example for percent estimation is adding a tip for a … Continue reading →

Algebra: Chapter 6 REVIEW, p 301 We worked on the Chapter 6 Test, version 2 today in preparation for tomorrow. Go over the questions at the end of the chapter, make sure that your notes are up-to-date. Math-8, Chapter 9-7, … Continue reading →

Algebra: Chapter 6, Lesson 9, p 291 Using Equations that Factor Read through the problems carefully. Tips: If `n` is a number, then the next even (or odd) consecutive number is `n+2` For length/width problems, DRAW A PICTURE to help … Continue reading →

Algebra: Chapter 6, Lesson 8, p 286 Solving Equations by Factoring First, we need the principle of ZERO PRODUCTS. If `a * b = 0`, then we must have either `a = 0` or `b = 0` or both a … Continue reading →

Algebra: Chapter 6-6 and 6-7, p 281 and 283 Factoring by Grouping – Day 2 (due to Challenge Day) – Wednesday Today was a work day for students with missing work to get caught up. Some of us were not … Continue reading →