By Jund, Barbara

ISBN-10: 1576854868

ISBN-13: 9781576854860

For brand new algebra scholars or these looking a refresher, this publication bargains a sequence of easy 20-step lesson plans that emphasize quickly studying of functional, crucial abilities. This up to date variation eschews pointless jargon and will get down to the necessities: • assurance of all very important algebra abilities, from combining like phrases to fixing quadratic equations • 1000's of perform workouts, together with be aware difficulties • An emphasis at the applicability of algebra talents to real-world (and real-work) difficulties • Bonus sections, together with suggestions for getting ready for standardized assessments

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**Extra resources for Algebra Success In 20 Minutes A Day (Skill Builders), 2nd Edition**

**Example text**

Subtract 10 – 8. Multiply 3 · 2. Add 4 + 6 + 1. Multiply 2 · 11 2{4 + 3[10 – 8] + 1} 2{ 4 + 3[2] + 1} 2{4 + 6 + 1} 2{11} = 22 Try this problem: 2{12 ÷ 2[10 – 2(2)] + 3} If you got 8, you are correct! 24 Team-LRN – WORKING WITH ALGEBRAIC EXPRESSIONS – Evaluating Algebraic Expressions What is the difference between simplifying an expression and evaluating an expression? In algebra, letters, called variables, are often used to represent numbers. When you are asked to evaluate an algebraic expression, you substitute a number in place of a variable (letter) and then simplify the expression.

In this problem, you need to add 5 to both sides of the equation to get rid of the 5. Example: x – 5 = 9 Add 5 to both sides of the equation. Simplify both sides of the equation. Add 0 to x. x–5+5=9+5 x + 0 = 14 x = 14 Example: a + 6 = 7 Subtract 6 from both sides of the equation. Simplify both sides of the equation. Add 0 to a. a+6–6=7–6 a+0=1 a=1 Example: y – 11 = 8 Add 11 to both sides of the equation. Simplify both sides of the equation. Add 0 to y. y – 11 + 11 = 8 + 11 y + 0 = 19 y = 19 Example: –r + 9 = 13 Subtract 9 from both sides of the equation.

Substitute 2 for the variable a and 4 for the variable b. When the expression is written as 2b, it means 2 times b. Multiply 2 · 4. Example: Evaluate the expression a 2 + 2b + c when a = 2, b = 3, and c = 7. Substitute 2 for a, 3 for b, and 7 for c. Find the value of 22. Multiply 2 · 3. Add the numbers. Practice Evaluate the algebraic expressions when a = 2, b = –3, c = ᎏ12ᎏ, d = 7, and e = 4. 21. 3a + e 31. c(12a) 22. ac + d 32. c2e + a 23. 4cd 33. d 2 + 7b 24. bd – 3e 34. 5(a + b)2 25. a 3 + ce 35.

### Algebra Success In 20 Minutes A Day (Skill Builders), 2nd Edition by Jund, Barbara

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